I've gone through 6 of these and still have 3. I've taken them all apart (suggested by another forum member) and found they all have the same issues. They're not totally sealed and naturally will corrode, VERY fast in salt. The solution is really easy though. Clean the wires, clean the washer, pack it full of quality die electric grease then run clear silicon around the base of the button. Also make sure you anti seize the bolts in the bottom or they'll have to be drilled

Click image for larger version. 

Name:	20150216_092651.jpg 
Views:	50 
Size:	50.9 KB 
ID:	351565Click image for larger version. 

Name:	20150216_092707.jpg 
Views:	46 
Size:	40.5 KB 
ID:	351566