i need help on this. My Civic 99 needs to be cleaned regularly.. like after less than 6 months, it becomes very dirty to the point na mahina na ang AC. i tried different AC shops, all where saying the same.. just a dirty evap and no leaks. im starting to think na baka its time to replace major parts na baka may leaks na or damage. What you think guys, do i need a new evap? (or what else).. thanks!