I think the aerosol can could probably leak until they don't work...but I just finished my stockpile from two years or more ago and they worked fine...

Thats what i would use mine on too, if I needed them! LOL But if I cant get them traded, might have to use them just so they dont get wasted! Hate to have too many in the stockpile alwasy scard of them going back, if household products actually go bad???

Thanks for the repo still have NO CLUE how to write one! Where IS IT??? Gah.... I hope they trade...I know it IS tough I suppose because most people can get things cheap anyway with BOGO etc but for a big multi pack or something it'd be great that's what I'd use it for... I just m moving towards healthy natural homemade cleaners as I run out of stock!