I'm having some trouble getting things fastened to the walls in my new rental. The building is about 100 years old, and from what I can tell the walls are drywall (at least on the outside). I've been trying to use the basic plastic drywall anchors, but they don't want to go in all the way; they seem to go into the pilot hole about 1/2 in but not any further. Tapping with a hammer just results in mutilated anchors. I'm pretty sure I'm not hitting a stud (no wood chips coming out on the drill bit). I've tried enlarging the pilot hole but no luck. Suggestions?
I'm wondering whether there's plaster hidden underneath the drywall. If that's the case, maybe I need a different type of anchor? I'm not hanging anything terribly heavy, just some towel bars and a mirror (about 10lbs). Has anyone used EZ Ancors in plaster? The EZ Ancor website says it's just for drywall, but the internets hinted that plaster might be a possibility. But I don't want to put bigger holes in the wall if it's not going to work. There's also the molly bolt type things, but I'm a bit worried about putting them in and then not being able to get them back out (or through), since this is a rental.
Thanks all!