Why cover it? You want to trap the carbon dioxide gas and pressure inside the pipe so it pushes against the clog, rather than fizzing up into your sink.
Pour 1 cup of dry baking soda directly into the drain. Try to get it as far down as possible. If it clumps up, use a long spoon handle to poke it down. drain clog remover baking soda vinegar
We’ve all been there. You’re finishing up in the shower, and the water starts pooling around your ankles. Or you watch the kitchen sink go from a quick gurgle to a slow, stubborn swamp. Why cover it