Just went out, removed my sender, cleaned and tightened the contacts, and reinstalled. I'll report back after a drive. Pretty sure I tossed my OG sender. 😬
She's back to perfect! When I turned the key she had 36 miles on the trip odometer and the newly reinstalled sender read 100%. When I got back she was up to 52 miles and reading 84%. Now to see if she maintains her accuracy. I assume she's very ground sensitive.
Might be worth re-ordering that rear mudguard kit Ken. All that crud being thrown up onto the sender connections can't be improving things.
Funny thing is I DID reorder it but not for that reason. It's pretty clean back there. In 5+ months and 3,600+ miles, she's yet to feel a raindrop.