I have a Suzuki Chromatix SCX64 16-hole chromatic harmonica. Recently I find that the slider becomes less smooth (or even gets stuck somehow) after I play for about 30 minutes. I tried disassembling the mouthpiece and the slider, cleaning them and putting them back. After that the slider usually became better for a while but then got stuck again. I use no slide oil.
I suspect that the problem might be caused by the tiny wrapper around the mouthpiece screw or the spring but I have no clue as I can't see what's actually happening under the piece of metal.
Did anyone have similar issues with the slider and possibly any solution for this?