New answers tagged cleaning
You can get very close to free with using a little diluted dollar store bleach. When you rinse it, rinse it well, then take a blow dryer and run it through the airlock for a few minutes and it will be dry.
Couple of things if you plan to keep using these air locks it's fine to rinse everything with water but run sanitizer through it. I keep sanitizer on hand in a spray bottle for all sorts of things. Try spraying a generous amount in the air lock after rincing gunk out of them. It might not be "free" but throwing out a bad batch because of an infestation is ...
It's ill-advised to take any shortcuts with cleaning or sanitation, even with an airlock. Clean it with PBW (powdered brewery wash) or OxiClean solutions prepared according to the directions on either package; alternatively, use un-scented chlorine bleach. Whatever is used, soak for a couple hours, and rinse thoroughly with clean water.
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