I plugged the sink, plugged the floor drain, plugged the toilet, and covered the toilet, why is the

Since your home's drainage system does not have a water seal, as long as the upstairs or downstairs residents do not use it, the smell in the sewer pipe will be messy. Your plugging method is what you think is the blockage, and it is not sealed, and now there are many products with the slogan of anti-odor floor drain, but in fact it cannot achieve the anti-odor effect at all. If your house is a PVC drainage pipe, the downstairs residents are also easier to talk, and the bathroom and other places are installed with a detachable ceiling, it is recommended that you negotiate with them to go downstairs to add a water storage elbow under your drainage pipe, prepare enough materials, ladders, etc., it will not take much time.

This is a one-and-done solution, and the anti-odor effect is also the most stable and effective.

Buy a taste-proof floor drain.

But the symptom is not the root cause, it must be that the sewer system is blocked.

It's best to find a property and ask them to hire a professional to get through. Otherwise, winter is coming, and it will be too uncomfortable.

The leaks you mentioned will not have an aftertaste until they are sealed with water. Maybe your floor drain doesn't have that function.