Rain & Raido

seems like every time it has rained (like once since May) or very heavy dew in the mornings my radio decides to work again but only for a few minuets, It usd to do this after l washed it and would work for a day or so then the screen would read "NO RAIDO"
it finally rained like a banchie here last night, even got caught in the rain, 60mph p hail on a bald head is a good enough excuse to wear helmet. sure enough this morning it worked for about 2 min then shut off and said NO RAIDO??
when it first started over 2 years ago it seemed like colder temps would make the wires contract enough to make a tight connection but as soon as 70 deg. no raido, I have never had the sting ray off till a few weeks back.
I have read some of the posts listed here, but no one mentions moisture "making" it work

I have tried ele.contact cleaner & ele. grease but still NO RAIDO

any ideas? other than sending it to England or where ever a few have sent theirs

2006 LT

Thanks Guys....