I have tried glass pads and I'm afraid you are suffering from a couple misconceptions heh 
Well glass pads don't have much friction at all. If you get new Teflon feet and use that with a glass pad, you have silence, no scratchiness, and a superb smooth glide. Much smoother than many plastic pads I have tried. And they are so hard to scratch and wear out too!
Downside is that your new Teflon feet will wear out in a matter of weeks (maybe a month) and then you will need to either buy new ones or endure a horrible scratching sound as you swipe.
Or you could purchase those Steelseries Glide strips (go over your mouse feet), I found that with my icemat they lasted for months on end, perfect glide with no nasty scratching sounds at all.

Well glass pads don't have much friction at all. If you get new Teflon feet and use that with a glass pad, you have silence, no scratchiness, and a superb smooth glide. Much smoother than many plastic pads I have tried. And they are so hard to scratch and wear out too!
Downside is that your new Teflon feet will wear out in a matter of weeks (maybe a month) and then you will need to either buy new ones or endure a horrible scratching sound as you swipe.
Or you could purchase those Steelseries Glide strips (go over your mouse feet), I found that with my icemat they lasted for months on end, perfect glide with no nasty scratching sounds at all.
















