Gretchen, you could try vinegar and baking soda which works if it is not a terrible problem. We use Rid X monthly to keep drains operational.

I boil about 2 qts. water and pour it down as fast as it'll go then use the white vinegar and baking soda. Then I follow it with more boiling water with some dish detergent squirted in it. Like Sherrie says, it'll work if it's not a major problem.

Does it have a stopper in the middle? If so have you cleaned that out?

Gretchen, is it the kitchen drain or where is the drain running slowly?

Kitchen or bath? each area has their own causes...in kitchens it is normally a grease build up issue and running a lot of boiling / extra hot water can do wonders.

In the bath the slow drains are caused by hair balls 99% of the time...snaking or pulling the traps and then running the hot to clear soap residues normally get things flowing again.

I tend to run the hot on full for a few minute (10 gallons worth) every 6 months or so in my ...»