This is from this site...hope it helps some
Fleas usually gain entry to your home through your pet or visitors' pets. For every flea on your pet, there may be as many as 30 more in the pet's environment.
Before reaching for pesticides, try these safer choices:
* Bathe and comb your pet regularly. Use mild soap, not insecticides. If fleas are found on the comb, dip the comb in a glass of soapy water.
* Citrus is a natural flea deterrent. Pour a cup of boiling water over a sliced lemon. Include the lemon skin, scored to release more citrus oil. Let this mixture soak overnight, and sponge on your dog to kill fleas instantly.
* Add brewer's yeast and garlic, or apple cider vinegar, to your pets' food. However, it is not advisable to use raw garlic as a food supplement for cats.
* Cedar shampoo, cedar oil and cedar-filled sleeping mats are commercially available. Cedar repells many insects including fleas.
* Fleas in the carpet? The carpet should be thoroughly vacuumed especially in low traffic areas, under furniture, etc. Put flea powder in the vacuum cleaner bag to kill any fleas that you vacuum up, and put the bag in an outdoor garbage bin.
* Trap fleas in your home using a wide, shallow pan half-filled with soapy water. Place it on the floor and shine a lamp over the water. Fleas will jump to the heat of the lamp and land in the water. The detergent breaks the surface tension, preventing the flea from bouncing out.
* Nematodes can be used to control fleas in outdoor areas your pets frequent. more info
* For more information, read our article: Natural Flea Control