What's the best agency to unclog a drain? I have a drain that is to say draining very slow. ...

I have a drain that is to say draining very slow. I freshly got the house and it a moment ago has a bunch of cast-offs in the drain (shower). What is the best product to put within the drain to get it to drain quicker.
Anybody know how to increase the dampen pressure...
Answers:    If you hold a pier and beam, the best point to do would be to get underneath there and undo up that section of piping and unclog it. If you enjoy a slab, It would be best to snake the line to break up anything is in in that. My house is on a slab and one of my genius kids sent a superhero down the shower drain. We tried snaking and shooting a elevated powered pressurewasher in within and nothing worked. As a later ditch effort, we grab our shop vac and forced air into the hole. We hear an audible sound as the toy be forced into the main sewage rank. You have to watch out with the chemicals you buy as some can't run into certain types of piping and will drink through them. A safe multi-piping blend is 1 cup baking soda+1 cup salt+1/4 cup cream of tarter. Mix ably in a bowl consequently pour 1/2 cup down sink drains and 1 cup down shower drains. Immediately follow with 2 cups boiling dampen. Wait 2 minutes then flush near water. Repeat if compulsory.
Chevron near techron surrounded by pasture mower toxic?
Lye if you can get you hand on it. Read the instructions it's an acid.