Originally Posted by
UAL T38 Phlyer
Life-Support technicians wipe down the mask between flights with alchohol, but don't wipe out the valve (not really accessible).
So, I flush my mask with hot water about every two or three weeks.
Dude, I wouldn't recommend doing that - for more reasons than just doing potential damage. Make the life support techs do their job right, they have ways they can clean the valve better then you can with hot water (long swabs, etc). Once a week tell them your valve is sticking and they will do the thorough cleaning - it's their job.