If you find that your cat does have unwanted guests it's important to treat the house as well. Sprays such as Acclaim are good for treating bedding, furniture etc. but it's a laborious job. I like the "bombs". You light a smoke bomb in the room and leave it to do it's job. It gets in everywhere and gets rid of the little blighters, doesn't leave a mess or smell (after the windows have been opened for a time) and also does the job on spiders and other creepy crawlies. This is either a fortunate or unfortunate side-effect, depending on how you feel about them.

Bob Martin does a bomb (not usually my favourite brand but I have had good feedback on this particular product) and there will be others, either on the internet or in pet shops.

Regards, Sue Purrshah-persians