If the problem is in the bathroom (and your family has hair), the most likely culprit is...hair. In which case Drano® Max Gel Clog Remover is the best solution. Simply pour it right on the standing water over a slow-running or clogged drain, let it work its magic, and pat yourself on the back, because that hairy problem is history.
If the problem is in the kitchen sink, there’s no need to throw everything but the kitchen sink at it! There’s a good chance your clog is grease-based. For a clogged garbage-disposal drain, use Drano® Dual-Force® Foamer Clog Remover . If you don’t have a garbage disposal, Drano® Professional Strength Crystals Clog Remover is recommended.
For more product recommendations, use the Drano® Solution Finder.