Yes I have 30 some years experience there in the sunshine state. That's why I finally moved.

The sprinklers there are usually hooked up to 'well water' & that will discolor lights & the paint for that matter over time.

 

Ive no idea where the car was parked i just bought it. We live in the country with the Ocala National Forest as a backyard. No sprinklers for me, I just mow what grows 😁

 

Im just going by a youtube video I watched that showed a comparison between off and other methods. Good luck!

 

I went ahead and tried the Rainx system on a taillight. The sealant that is applied as the last step smells just like armour all, I suspect that is what it is. Heres a pic of the restored taillight lense and the other side unrestored lense

 

Spiffy clean! Nice.