I have a Chitek Super Nano screen protector and I use homemade styli. The commercial styli I have tried and/or read about don't work for my writing style - they tend to require lots of downward pressure and have a fat bulky tip. I don't get any squeaking. I suspect if you have a stylus with a rubber tip that you are using right on the glass, that is the source of squeaking. If you like the stylus you have, a screen protector will likely eliminate the squeak. The Chitek is too soft for my liking and I will be trying a different type soon.