this is a minor problem but my rear wiper wont clean all my window....it misses almost 1/2 of the upper window. i noticed the arm seemed stiff so i worked it back and forth and it loosened alittle. it seems the spring in side to give it the tension on the window is no good. could that be it? also....the arm could use some paint..how do you remove it? another question i have is....can you get an after market air dam that looks like the original with the hook cutouts but also with light holes? if i decided to cut the one i had for lights how would i go about mounting them in the cutouts?