Not sure what is going on here. My bathroom sink takes a long time to empty. This has been off and on for about 2 years. I have removed the trap and nothing is in it. I have snaked the line from the sink and from the trap and found no blockage. the only thing that works to clear it is the bladder type thing you attach to a hose and put in the drain. this works for a few months then I have to do it again. No other drains in the house have this problem and the toilet in the bathroom works fine.
Any ideas or suggestions would be GREATLY appreciated!
It could be hair and gunk around the rod that raises and lowers the sink stopper. Pull rod out of the drain line then bend a hook on some light wire, pull the stopper out and fish the glob out with the wire.