Does anyone know what the shelf life of a spray can of ant and roach killer would be? Pyrethin based. I bought a can last summer and it doesn't seem to be very effective. Would I be better off buying non-pyrethin based products if I want to carry over from year to year. The same goes for wasp sprays. You certainly don't want to use a can thats not going to kill anything.
- posted
18 years ago