Trailer like I sadi not sure if the guys was blowing smoke up my tailpipe or not. It did make sense though, the "blower thingy" is not as effecient but works.

Alsatian, probably the exact "thingy" I have/use.

I also heard of guys using water to remove particles then tipping to remove most, wipe the metal edges with q-tips, let dry and then using the lnse cleaner and cloth.