I rode through the heaviest rain I have ever been in on a motorcycle on Sunday morning in northern Wisconsin. I was chewing gum and my mouth was literally filling up with water! When I went to clean the bike this morning there was a pool of water 1 inch deep across the entire bottom of the headlight...I could have put a fish in there! I called the dealer and he said "we'll that's not a sealed unit"...NO **** COLUMBO!!.....anyway I took the headlamp out and tipped it and the water came out...still works too (2013 SG)

 

if you can rinse with vinegar and slosh around

then finish with distilled water.

mike

 

what mkguitar said. Also make sure the boot covering the bulb is seated properly.

 

This is most likely how the water got in, in the first place.

 

Well that is a new one. Amazing that it still worked.

 

Ethyl alcohol (Ethanol) will capture trapped water then evaporate. In principle rain water carries no mineral load so it should leave no trace.