Struggle between Organic and Chemicals with Fleas

I have had pets indoors and out and have never had a real problem with fleas until recently. I found Max the Sunday before Thanksgiving last year. I fed him, took him to the vet, had him neutered, and checked for fleas. He was in good health and had no fleas. Everything was great until spring. I've used frontline, diatomaceous earth, flea spray, bug bombs, vacuuming, bathing cat, combing cat, drowning ones I could catch in soapy water, laundering clothes and it has been a constant battle. Hopefully it is coming to an end. It has worn me down, stressed me out, and used up time and money I really don't have. On top of that, someone at work found out and threw it in my face last night in a rather rude manner. Still, my Maxie is worth it.