Drano is one of the them. Liquid Plumbr (correct spelling) is another that will unclog stopped up drains and improve the flow of slow ones. Many people dump a pot of boiling water down the drain once a week to melt any soap and grease buildup. If you do that regularly, you can keep the drains flowing. You could also run a plumber's snake down the drain and manipulate it, or use a plunger to break up the clog and move it along. But never use the plunger or the snake if you've just dumped Drano, Liquid Plumbr, or other caustic substances down there. What I do -- as much as I HATE to do it -- is remove the P-trap and clean it out. It's gross but effective.
You have a blockage in your main sewerline. You have a problem with your venting system. This is why some codes now require a vent within 6" of the toilet. If you will add a vvent to your main line at the toilet you will stop this. Check to make sure your vents are not clogged by a bird or bees nest first.
A double kitchen sink that is draining slowly could be clogged with debris such as food particles. A snake is a tool that can be found at a hardware store that is used to remove things clogging flow in a drain.
OF COURSE
1- Increase the diameter 2- water jet the lines to scour them back to full flow as designed
One way to open a slow kitchen drain is by using a plunger on the drain. If the drain is still slow put some baking soda and vinegar in the drain to loosen any debris that remain in the drain.
You might improve a modern kitchen by purchasing appliances that are energy efficient and cost effective. You might also improve the kitchen by adding insulation to the walls and flooring of the kitchen to retain heat in the winter.
snake
Make sure the drain line and the vent are cleared. Noises like that are usually caused by either restricted flow or a plugged drain vent.
Vent issue can be one of the reason causing kitchen drain problems or It could be possible that the setup of your piping/p-trap, is not allowing air through, which is causing the water to not be able to flow smoothly after air pockets get cleared the the kitchen drain will run smoothly.for which you need to hire plumbing repair service
Kitchen sink and washer use same drain line. Drain line clogged causing backup of drainage from washer into kitchen sink. Have drain line unclogged to take care of problem. If drain line not clogged, check for proper venting of drain lines.
They should not be cleaned in the kitchen sink and YES, it will harden in the drain.
Bathroom or kitchen should be square and level. The plumbing drain lines need slope to drain properly.