Cleaning & Maintenance Of Your Echo Flask™

Keeping your Echo Flask™ clean is key to maintaining optimal hydrogen production, great taste, and long-term performance. Below is a simple guide to help you stay on track.

Frequency

Regular cleaning ensures optimal performance and extends the lifespan of your Echo Flask™. Follow the instructions below for effective cleaning.

Even if you’re using RO or distilled water, buildup can still happen over time (just in smaller amounts). That’s because:

• There can still be trace minerals present
• Residue can build up gradually with repeated use
• Environmental factors can contribute as well

So while it’s less common, a periodic descale is still really helpful to keep everything running at its best.

What Does the “Clean Flask” Cycle Actually Do? 

The “Clean Flask” cycle is an important feature, but it’s helpful to know that it’s not solely for cleaning purposes.

During this cycle, the Flask works to balance the polarity of the generator plates. Over time, minerals in your water can cause uneven buildup on the plates due to the electrolysis process. The clean cycle helps:

• Reverse and balance polarity across the plates
• Loosen light mineral buildup
• Maintain consistent hydrogen production performance

Accidentally Drank Cleaning Cycle Water?

Don't panic. The cleaning cycle primarily generates oxygen to help clean the system. Accidentally consuming a small amount of cleaning cycle water is unlikely to cause harm or discomfort.

What To Do

• Discontinue drinking the cleaning cycle water.
• Empty the bottle completely.
• Rinse thoroughly with clean water.
• Resume normal use.

For future cleaning cycles, always empty and rinse the bottle before drinking.

Why Manual Cleaning Is Still Important

While the clean cycle supports the internal function of the generator, it does not fully remove buildup, bacteria, or residue on its own.

That’s why manual cleaning and descaling (with vinegar) are still essential to:

• Fully remove mineral deposits and scale
• Prevent mold, mildew, and bacterial growth
• Eliminate biofilm and residue buildup
• Keep your water tasting fresh

The Best Approach

Think of it this way:

• The Clean Flask cycle = maintains internal balance and performance
• Manual cleaning + vinegar = deep cleaning and sanitation

Using both together ensures your Echo Flask™ stays clean, safe, and performing at its best.

Another helpful tip is to let your Flask breathe overnight. Rather than storing it tightly closed, you can leave the cap off overnight, which allows trapped humidity around the upper bottle, cap, threads, and gasket area to escape instead of remaining sealed inside. Reducing that constantly damp environment can help discourage the conditions that allow mildew and odors to develop.

There is one important distinction with the Echo Flask, though: the generator at the bottom should remain hydrated. If you leave the cap off, keep enough filtered water in the Flask to fully cover the generator (roughly about 1/4 full), while still allowing the upper portion of the bottle to remain open to the air. This helps protect the generator from drying out while giving excess moisture elsewhere in the Flask an opportunity to evaporate.
 

Cleaning The Bottle & Generator

Cleaning the Inside of the Flask:

⚠️ Important Do’s & Don’ts

🚫 Never use harsh chemicals or abrasive cleaners
🚫 Never submerge your Flask or place it in the dishwasher
💡 Doing so can damage internal electronics and void your warranty

Regular Cleaning (Weekly):

To keep your Echo Flask™ performing at its best, we recommend cleaning it at least once per week. If you’re using it frequently, you can clean it daily or as needed—a little extra care goes a long way.

Step-by-Step:

1. Wash the inside of the bottle with mild soap, a bottle brush, and filtered water
2. Rinse thoroughly. Make sure all soap residue is fully removed
3. Fill with filtered water and run the “Clean Flask” cycle (access this through your settings menu)
4. Once complete, pour out the water & rinse thoroughly. 
5. You are clean and ready to go! Fill with filtered water and run a standard hydrogen cycle as needed. 

💡 Tip: If you use your Flask frequently, you can clean it more often—daily if needed.

Keeping up with regular cleaning helps maintain performance, prevent buildup, and keep every sip tasting fresh.

Deep Cleaning & Descaling Instructions (Monthly):

Over time, minerals from your water can build up on the hydrogen generator. This can affect performance if not removed.

White vinegar is a natural, safe descaling and sanitizing agent that plays an important role in keeping your Echo Flask™ clean and performing at its best.

It helps to:

• Break down mineral deposits (like calcium and magnesium) that build up from water over time
• Remove buildup on the generator plates, helping maintain efficient hydrogen production
• Eliminate bacteria, mildew, and mold by creating an environment where they cannot grow or thrive
• Dissolve biofilm (that slimy residue) that can form inside the bottle and affect cleanliness
• Neutralize odors and improve taste, keeping your water fresh
• Restore optimal hydrogen production by keeping internal components clean and unobstructed

💡 Why this matters:
Without regular descaling and sanitizing, moisture combined with minerals can create the perfect environment for mineral buildup, bacteria, mildew, and mold growth. Vinegar will help prevent this by both cleaning and disinfecting at the same time, making it one of the most effective and safe options for routine maintenance.

Step-by-Step Descaling:

1. Fill the Flask using a mixture of:
   • 1/3 white vinegar (5% acidity)
   • 2/3 warm distilled water
   • For a deeper clean, you may use straight vinegar without water dilution.
2. Let it soak
   1. Minimum: 2–3 hours
   2. Best: Overnight for deeper cleaning
3. Pour out the vinegar mixture & rinse thoroughly with filtered water until the vinegar is fully rinsed out.
4. Fill with filtered water and run the “Clean Flask” cycle (access this through your settings menu)
5. Once complete, pour out the water & rinse. 
6. You are clean and ready to go! Fill with filtered water and run a standard hydrogen cycle as needed. 

TIP: For manual cleaning, stick to gentle tools (like a small brush) to protect the interior of your flask. 

Any flexible, narrow, non-abrasive bottle brush with a 1" diameter head and at least 12" in length that fits comfortably through the opening will work as well. The important part is choosing something soft and non-abrasive so it can clean the inside without scratching or damaging the Flask.
 
A few things to avoid are stiff or coarse bristles, abrasive scrubbers, or metal brushes. You can usually find them pretty easily at local grocery or home goods stores or online through retailers such as Amazon. 
 

A few quick tips when choosing one:

• Stick with soft, non-abrasive bristles.
• Avoid metal scrubbers, scouring pads, or anything that could scratch the interior.
• Choose a brush with a long enough handle to comfortably reach the bottom without having to force it through the opening.
• A little mild dish detergent and warm water work great for routine cleaning.

You definitely don’t need to spend a lot on one—  a simple narrow bottle brush from your local store or Amazon should do the job nicely.

Suggestions: 
Bottle Soft Brush Sponge Bottle Brushes 2 Pcs with 2 Pcs  
Brush Bottle 2 Pack 1 Long 1 Short Cleaning Brush 2pcs 
 

Cleaning The Exterior:

• Hand wash only with a soft, damp (not wet) cloth.  Avoid using rough cloths or sponges, as these may scratch the surface.
• Do not place the Flask in the dishwasher or submerge it in water.
• Keep it dry: Be especially careful to keep the screen, charging port, and generator’s electrical components completely dry during cleaning. Water damage done to these areas is not covered under warranty.

💡 Optional: USB-C port plugs are available through third-party marketplaces such as Amazon. These can help protect the charging port during use & cleaning.

Cap Care

The cap is essential for proper pressurization, so keeping it clean is important.

• Clean weekly using a soft cloth or brush to clean the threads and crevices of your cap. 
• Use vinegar to clean the cap threads & gasket to prevent buildup and bacteria

⚠️ Avoid submerging the cap, as water can enter the pressure valve and affect performance. If water does get inside, allow it to air dry before use.

Gasket Care

• Carefully remove the gasket using tweezers or a dull object (avoid puncturing it)
• Clean with mild soap  OR soak in vinegar solution (up to 2 hours) to help prevent buildup or bacterial growth
• Rinse thoroughly
• Reinsert correctly (Please make sure that the gasket and surrounding areas are clean of debris before reinserting). Make sure the “line” side faces inward
  

💡 A clean gasket = a proper seal = better performance

Your Echo Flask™ is now clean and ready for regular use!
 

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Water Tastes or Smells Strange

Hydrogen-rich water should be fresh and odorless. If you notice an unusual taste or smell, it is typically caused by one of the following:

• Water source quality
• Mineral buildup
• Mold or mildew growth
• Insufficient cleaning

If you are starting to notice a weird taste or smell from your bottle, please do the following:

1. Change Your Water Source. For best results, use: Distilled Water or Reverse Osmosis (RO) Water. These water sources contain fewer minerals and impurities that may affect taste and odor.
2. Check Storage Habits: Avoid storing excessive amounts of water in the bottle when not in use.
   • Long-term standing water may contribute to:
     • Mold growth
     • Mildew growth
     • Mineral deposits
     • Unpleasant odors
3. Clean and Descale
   1. Thoroughly clean the bottle and cap.
   2. Inspect under seals and lid threads.
   3. Perform a descaling cycle.

Unusual smell or taste is not covered under warranty. 

🔗 How should I properly store Hydrogen Water?

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Best Practices for Long-Term Performance

✔ Use RO, distilled, spring or filtered water

✔ Clean the bottle and lid regularly

✔ Descale periodically

✔ Keep the oxygen port dry

✔ Inspect seals and threads for mold or buildup

✔ Store properly when not in use

✔ Avoid dishwashers and full submersion

✔ Dry the charging port before charging
 

Following these simple maintenance practices will help ensure your Echo Flask™ continues performing at its best for years to come.