How to clean years of accumulated gunk from kitchen sink piping
Buy two (2) Rubber Fernco couplings, and a 50 foot electrical snake. Close to where the 2 ties into the 4 cut out a 12 inch or so section of 2 inch pipe. Run the electrical snake through your cleanout to where you cut out the section of 2 inch pipe. Bend a hook in the end of the electrical snake, and attach a rag to the hook. The rag should be a snug fit. Pull the snake back through. Repeat till the pipe is clean. You could use a bottle brush too. Clean the cut out section and chamfer all ends. Mark the cut out section to where 1/2 the fernco coupling will be on each pipe. Put dish detergent on one fernco and slide on pipe. then slide both into place centered on cuts and tighten bands.
If cutting of the pipe allows you to move it out of alignment, use one fernco.
Wear rubber gloves, long sleeves, and safety glasses. Dont use chemicals.
This will allow you to clean the pipe any time you want.
" A lot of men build things, and a lot of things fall down "