Windshield wipers worked inconsistently

I have a 2009 Chrysler Sebring. A few months ago the windshield wipers stopped working properly. Whenever I turned the control switch from off to any of the on settings the wipers would move about 10 degrees. When I turned the switch off the wipers would move some random amount. Based on a friend’s suggestion I replaced the wiper motor. That did not fix the problem. I replaced the switch and that fixed the problem. I have not had to use them much since then but they seemed to work. The motor was a refurb and the switch was new. Both came from NAPA.

A couple of days ago I was about 20 miles into my highway commute home in the rain when the wipers stopped working. None of the delay modes worked but if I moved the switch from low to high the blades would make a complete up and down motion plus a little more up. This was the situation for the next 15 miles. I parked the car at home and went inside for about 45 minutes. When I came back out and tested the wipers they worked perfectly. It had stopped raining so I sprayed the car down thinking the water might be the issue but the wipers worked fine. I have not driven in the rain since then but they have worked whenever I randomly tested them.

Is it possible that the new switch is going bad? The other suggestion I was given was "something is loose."

Other facts about the car:

1. The ground wire to the right headlight went bad, so the socket is grounded to the frame.
2. The TIPM has been replaced (done before I realized the bad ground was the headlight issue and it is too much work to put the old one back in).
3. The instrument cluster has been replaced because the lights in the original one stopped working.
4. The remote start has not worked for many months. Years ago it stopped working when the car threw a code but it started working again when the code was cleared. Now it doesn’t work and there is no code.