Chalk is not needed by beginners and should only be used sparingly by experienced climbers. Do not use resin powder. It blocks up the pores in the rock and leaves the holds polished. When cleaning holds use only a soft brush or cloth. Never use a wire brush or blowtorch.
Wet rock is much weaker than dry rock.
If the rock is wet, climb carefully and within your standard. Do not pull hard on any sharp hold, it could easily break. Try to stop your feet skidding on sloping holds. Never climb with axes and crampons, even on the rare occasions when ice forms on the rock. Setting up a Belay 10.