The Fle-a-later
The fle-a-later © consists of an incandescent bulb (sorry, the newer CF or LED lamps won't work) in a table lamp laid on its side, over a bowl of soapy water. An old SCS light dimmer is used to dim the lamp so that it has just enough energy to keep the water warm. Place the table lamp's shade over the bulb (metal lamp holder to glass - you don't want to start a fire) to improve the appearance. Fleas are attracted to the heat and jump into the water. The soap breaks the surface tension and the fleas sink.
Flea lovers can leave out the soap so that all the little fleas can enjoy the spa in safety.