OK imaghine there are 6 zones (well in fact they are), press in the middle of a zone, if you are at the very edge or just out it might not register.
If you count 1 to 6 left to right, zone 1 takes a second or so longer than the others to respond or used to. Long story. The zones may take a wile to respond so don’t tap, lightly touch (slight pressure and hold. A quick tap and it may not register…(mistouch prevention)