Drano and other decloggers are expensive, and if you have old, sluggish pipes like I do, you can spend a lot keeping the flow going. Like a lot of household products, there are a number of DIY alternatives that work just as well (or almost) and don’t cost much. For an easy pipe declogger, pour half a cup of baking soda down the drain followed by a ½ cup of white vinegar. Let it sit for half an hour and then pour about 2 quarts of boiling water after it. Repeat as needed. BTW: If you do use Drano, don’t follow the instructions on the bottle of pouring 1/5, 1/3, or a half of the contents as usually specified. They’re just trying to get you to use a lot of product. Pour about a shot glass at a time. Put a full kettle of water on, and when it whistles, pour it down the drain. Repeat until the drain is clear.