Call Lightforce and let them know. I am guessing your units have either no seals or bad seals. Lightforce do stand by their products
I have approached arb a few years ago with the problem and they wernt interested as they were three years old at that stage. they are now probably 6/7 yrs old and still produce a good light but im just dirty the reflector stuffed up in three yrs. when i bought them six +yrs ago they were really dear back then so i was pissed when they started to fuck up