That’s a good question.  I’ve wondered that myself.
I generally use my cannulas for about 6 months at a time, at which time they get stiff and uncomfortable, so I get a new set.

I’ve NEVER changed my bubbler hoses (since 2005) and there is no observable ‘bacteria’ or mold in them… 
And my home is in a high humidity area (next to a large lake) so I get mold in my toilet, etc.  
But the electrolyzer gas hoses stay nice and clean inside.

Do you clean the tubes, and if so, how, and how often?


As above.

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