I had the same problem. I get the idea that I'm dreaming and I tell myself 'i should check my hands!' but for some reason I cant get my hands to my face. Instead of trying to RC with your hands, just ask yourself if your dreaming and use that as a confirmation instead. The easiest way to tell if you're dreaming is by asking how you got where you are/were. It's as easy as that. Reality Checks aren't even necessary TBH, but they do sometimes help, say for example, you weren't sure if you were dreaming. Other than that I would say just question your surroundings and you should be fine.