Streaks/stains on ZEP floor wax exterior - need advice

I use a mild soap solution when washing of Dawn detergent. It cleans the MH well and doesn't effect the shine or cause any other problems. My initial application is going on 3 years now and the only places that I've had to retouch is the door (poor preparation to start with) and the overhead cap...I tend to be very agressive on the bugs. I never add any wax so reapplication is an easy job on the small areas.