I've had issues with my kitchen sink's strainers and I've replaced them both, but I'm still having some problems with one of them. I did what I think is fairly normal procedure: undo the piping + basket nut, pop out the basket, clean everything well, wrap plumber's putty underneath the basket, press down, reassemble nut and piping under the sink and then peel away the excess putty on top. It (seems) to have worked fine for one side, but not the other; it still has a slow drip, almost like condensation, when the sink is filled with water.
I've pulled it apart and replaced the putty and gasket a couple of times now, but still can't seem to get this one to work. I've run hot water down the tap and managed to move the nut a tiny bit more, although if I tighten it much more then I'm worried that the nut will crack or I'll squeeze the gasket out. There's no play in the sink strainer itself. When I was tightening it down it did twist maybe 15 degrees as I was tightening it, but afterward I kept water in it for around 30 minutes with no issues. That was about a month ago, and the water just started to start to drip.
I haven't seen any more putty leak out of the sink since, and there's no play in the sink strainer if I try to wiggle it a bit. One thing I did notice with this side is that it seemed like the hole might have been a hair bigger than the otherside; I had more plumber's putty on the bottom with this one. Although I would have thought that with a good plumber's putty seal and really tight gasket that I should be fine.
Any suggestions? This doesn't seem like rocket science but I'm starting to get a little frustrated.