Drano Max and 30 minutes waiting?
Didn't work. Tried drano. Tried Instant power drain cleaner and left it overnight. Then poured boiling water in. Nothing.
And btw, do not get that stuff on you. I tried plunging, got some on me & it burned the hair & some skin off my arm. Luckily, chemistry class knowledge kicked in & washed it off right away for 10 minutes, otherwise would've been worse.
The water just stayed there. So, then googled some more and found out there might be a sewer line access from outside the house. So I went and opened it & everything gushed out.
Bought a 25 ft snake and ran it through. Tried again & still clogged. Found another video where's he said it's a T and put water in, if the water comes back out, the clog is in the section that goes down. So to get the snake to go down, just bend it back on itself, insert & you'll feel it pop down, then run it down. Ran into resistance 3 times. Tried again & it was cleared.
My theory is there was so much water in the pipes, that the chemicals were being too diluted to do anything.... except burn my skin
So now I'm just going to put some of that instant power stuff in there every 6 months.
Tldr : chemicals didn't work. Had to use a 25 ft snake & run it through the sewer access outside down away from sink