Otherwise, I put tea tree oil in the wash with things like this that are particularly exposed to icky things.
= Pariah, Super Mom + The Amazing Wiggy (1/06) + (6/08) 52 Projects: 0/52 Decluttering Challenge: 37/2013
“It is simply no longer possible to believe much of the clinical research that is published, or to rely on the judgment of trusted physicians or authoritative medical guidelines.” - Marcia Angell, M.D., former NEJM Editor Private Parts are Private Property!
I just replaced mine, it was at least 10 years old and orginally came from IKEA.
I didn't wash it every week, maybe more like once a month or as needed.
(although I come from a family that would use it in the garage to collect grease under a tractor or something like that before it got tossed.)
DS, 10/07. Allergies: peanut, egg, wheat. We've added dairy back in. And taken it back out again. It causes sandpaper skin with itchy patches and thrashing during sleep. Due w/ #2 late April, 2012.