Hello all. I have a kitchen sink which I thought was clogged in the black tubing roller coaster (or whatever you call it) directly under the sink, so took that apart. It was apparently not the problem, although there was a lining of 'gunk' in there which was removed. Upon replacing the tubing and rerunning the water, it continued to back up into my 'double sink'. I took off the entire tubing under the sink so that the only thing remaining as of this moment is one length of horizontal plastic tubing which I could not seem to untwist (about 18 inches) which connects up to some metal piping (horizontal but there appears to be a curve or a clog just beyond my eyesight as trying to shove a piece of garden hose into it (I am somewhat inventive) resulted in it hitting a barrier when about two or three feet of hose was fed through. Maybe it is just a curve in the piping, and certainly 'hosing' is not very flexible. I hoped if it was a clog, it would knock it out if it could be reached. I found it interesting that in taking the hosing out again, it was not covered in gunk??? I bought cleaner (Zep industrial brand for grease as that seems the likely culprit) which did not do the trick although with pouring hot water after the fact, it drained through VERY VERY slowly a sinkful of water would likely take a night to drain out. I do know from reading and common sense to be careful since the cleaner may still be in the pipes, as well as to be careful of 'mixing different ones together'. I bought a 15 ft (1/4 inch) snake by Plumbshop purchased at Home Depot, but I think it may be defective or broken. I can't get it to extend and the instructions seem quite straight forward and the packaging looked like it may have been opened previous to my purchasing it yesterday. So either I am a doorknob in terms of my fix-it know how, or it truly was returned and re-shelved. I heard that it might be necessary to get a long snake and actually climb on the roof to run it downwards? I would if need be. However, who out there knows their plumbing mechanics enough to know if that was likely a bend in the piping, a clog, etc of which I spoke above? And of course, feedback would be appreciated.