Probably the contacts for the touch pad are dirty. Normally, those type use a carbon contact that bridges 2 electrical pads, and completes the circuit. If you are 'froggy', you could take the front panel off the circuit board and clean the contacts with an eraser. I have the same issue with my LCI electronic leveling system.
2006 Damon Daybreak 3276 35'with 5 Star Tuner. 3 200 Amp Lithium batteries and 2000 watt PSW inverter/charger. 2013 Elantra on a Master Tow dolly.