Ah, it's really pain in the ass.
Yesterday I used my extending 3rd party stylus (Gametech) while playing PoR. The screen got awfully scratched in 30 minutes. In damn 30 minutes!
I had to take my screen protectors off (they were Hori ones). And it was hard to take them off. Well, in the end I used a toothpick, 'cause wood can't scratch a screen. Well, now I need to buy a pair of new ones. The funny thing is that I used that stylus for around 2 months with no probs at all. Somehow it got messy, it seems. I get I'll have to stick to the original one from now on.
My touchscreen is in PERFECT condition though, as I never use it without a screen protector. I'm VERY anal about my DS.
Burunduk, you really need to change your "face plate", learn some English dammit.