How do I hang pictures with sawtooth hangers on a very light (i.e. not compact) wall? Some additional facts:
Plastic hard wall hangers like these do not work:
I wrecked a frame which I hung on one of these because it fell down.
Ergo, I need something stronger. I tried to drill a hole and fit a plastic anchor, but the anchor wouldn't sit well in the hole because the wall is so light. An attempt with an expansion anchor did not work either.
Do you think I used the wrong kind of expansion anchor? Are there other options? Please advise. The hangers on most of the pictures are of the sawtooth variety. I also have pictures with wires.