Pet flea advice

I’m looking for any advice on how to get rid of fleas!

We have 2 dogs and 2 cats and they’re infested. My husband and I are getting bit in our sleep we’re miserable and we know our pets are miserable.

I feel like I’ve tried everything. When I first noticed the fleas I gave them a bath in dish soap. It killed a lot of them but not all obviously.

I gave them all pet armor plus that goes between their shoulder blades but saw no change. I heard good things about capstar so I gave them all capstar two days in a row and I kept seeing dead fleas all over the place so I thought it had worked, but they’re back again.

We tried a spray for our bed and their pet beds to find a little relief at night but that didn’t work.

I’m open to trying anything. My one dog is losing hair from scratching and biting so much and I feel horrible for them.

Thanks!!