I could give the three of them a bath, yes, but that would be traumatic.
The "flea dirt" was found on only one cat.

The sheets were pretty dirty that they slept on. I didn't wet it to test it before I threw it into the laundry. my cats like to roll in dirt.

Those chemicals sound impressive!

tell me about "premise spray"

I hate to spray the mattress i am going to sleep on!