I'm trying to find where the studs are on a wall in my bathroom so I can hand a shelf and at least have some screws go into a couple of studs, but my stud finder is weird. I can go over the same spot multiple times and sometimes the stud finder light goes on as if there's a stud there, and then I'll go over the same spot again to confirm and it doesn't light up.
Is there a way to confirm a stud is there before actually drilling a hole since the stud finder is being weird? I don't know if I'm holding it right or not, or does it matter?