To fix a a slow draining toilet, drain the bowl completely then pour 1 cup of baling soda and 2 cups of vinegar. Follow it up with a gallon of hot water after 15 minutes. Alternatively, plunge the toilet or snake it using a toilet auger. Unclog the vent stack as well.

Your toilet may be flushing slowly because it's partially clogged; to remedy this issue, you could use a plunger or a drain snake. Pouring either hot water and dish soap or baking soda and vinegar down the drain and flushing after 20 minutes could also unclog it. Another problem with an easy fix is a toilet with a low water level.

There are several possible reasons a toilet may be flushing slowly or inadequately, and determining the cause is necessary before the problem can be fixed. Common causes of a slow-flushing toilet include low water levels, a partially clogged drain, mineral build-up on the jet holes, a defective flapper, and a blocked drain vent.

To fix a slow flushing toilet, adjust the water level in the tank to just about ½ inch below the overflow tube and ensure that the flapper chain has a slack of ¼ to ½ inch. Unclogging the toilet rim holes, siphon jet, vent stack, and drainpipe will also help the toilet have a strong flush.

So what’s the deal with a slow-draining toilet? Most likely, the problem is a clog in your toilet. Non-flushable objects like baby wipes get stuck in the pipes, preventing your toilet from draining fast. The other two factors leading to the slow toilet drainage include clogged rim jets and a low water level in the tank.