I suspect you're referring to small moths about 3/8" long or less which are found primarily in the kitchen, although one there's an infestation, they can be found anywhere in the house. If so, they're probably Indian meal moths.
See:
http://www.bugclinic.com/IndianMealMoth.htm and
http://www.ipm.iastate.edu/ipm/iiin/mindianm.html for more information, and for photos.
I used to think that they came in as larvae in food, and that's probably the case. But I've also found them in cocoons on plastic grocery bags. Once they're in a grocery store, they can lay eggs anywhere.
First, check your food supply, especially flour, sugar, chocolate (they love it!), rice, and grains. Check canned goods as well; I've often found larvae tucked into cocoons on the rims of cans.
If the food is infested, discard it. Larvae in cocoons on can lids can be removed with a paper towel, kleenex or Q-tip dipped in rubbing alcohol, which anesthetizes and kills quickly.
After you've cleaned your pantry, wipe down the shelves and storage area. Sometimes I use rubbing alcohol; bleach can be used with plenty of ventilation and eye protection, but I find rubbing alcohol easier to tolerate.
Refrigerate grains and rice. There may still be larvae which haven't hatched, so there could be more for a few days or week after the cleaning. Sometimes it takes a few thorough top to bottom cleaning. Don't forget kitchen cupboards.
Keep checking your pantry and food storage areas regularly.
Good luck; they're really quite a nuisance. I've had several infestations, with outbreaks occuring several months apart.
