I am not sure how long this will last, but it works great.
I put a small amount of silicone sealant around the nipple. I kept the level just below the button and nipple surface. You do have to wait for drying, but when its set, it stiffens the nipple and keeps it in the center and will never scratch the foil switch. If you do not like it, use tweezers or small screwdriver and peal the silicone out.

Time will tell the longevity.