SFMS, the product I was trying to think of last night is called Defend. It's a permethrin. (not for kitties! Just dogs.) I don't know if it's available in the US. I'm sure there are similar products. I don't think they work as well as the more $ stuff but it may help. We are lucky up here in Western canada to not have a huge flea problem. I used to live on the east coast -- ticks, fleas, etc. ugh.