If your Game Boy Color buttons are sticky or unresponsive, it's likely that the conductive silicone pads are worn out or dirty. The first step to restoring your console is to try cleaning the pads with a Q-tip dipped in isopropyl alcohol. If that doesn't work, consider swapping them out for a brand new replacement set.
Looking for start-select silicone pads to complement your new buttons? High-quality, machine-cast silicone start-select pads are available in over 20 different colors.
These really do being back this nice , firm press. That honestly I didn't even GBC had. I also have similar ones on my GBA and they're equally as nice.
I order these as the original from my gameboy as been worn and stiff. when I replaced them, it feel much nicer and smoother now.
Perfect Pads, responsive like the original one!
Game Boy Color Silicone Pads
I found the dpad did not work well on the diagonals with these membranes when paired with the funny playing shell and buttons. I tried a dpad riser but it was too high. YMMV depending of the buttons and shells used.