I used this treatment years ago, it was recommended that you have a light shining down on the water to attract the fleas during the night ( used a desk lamp).My DH questioned how the fleas would know to go to that room, so I made a big sign saying " Fleas -- this way". Don't know if it was the sign or the light but we sure caught alot of them.
I have used this for years and while it won't rid the house completely of fleas, it sure does help. I use foil pie pans, put a few drops of dish liquid (don't use citrus scent of any kind), put some water in it, swish it around and put it under a night light. I've used it on hard wood floors as well as carpet. If your dogs have fleas, you can soap them up with Dawn dish liquid, let it sit a couple of minutes and they wash right off! I prefer it to pesticides on my pups!
Don't use lemon soap. It repels fleas.
A thread at Thriftyfun.com recommends this along with finely ground salt. Sprinkle the salt on the floor and vacuum up in a few days. Repeat as necessary. I've been using beneficial nematodes for the yard, insect growth regulator for the carpets, and Sentinel heartworm/flea medication for the dog. Expensive, but worth it!
This works like a charm when you use the nightlights. It is heat and light in combination that attract the lil buggers. We used these in our house while we were battling a bad infestation. We did have to use powders and sprays as well. But it sure is interesting watching them drowned. By the way, if you do not use a soap, the buggers can swim to the rim and get out. Best to use the soap!
This really didn't do the trick for me. I followed the steps exactly, but never really saw more than just a few fleas in the traps. One of the traps I made up I set right near where my dogs sleep! I know they were both full of fleas. So I finally just broke down and bought some expensive flea treatments for them, and also some spray for the carpet. It was a good idea though.