dont use a qtip spray soak that tunnel, it will dry quickly. just dont hold the spray nozzle to close. the brake cleaner will degrease the whole tunnel. It will clean it much better than a qtip. also you could have messed up those little delicate wires with that big(incomparison) cotton qtip. try again. others have stated that it really helped thier car but like i said, mine really was that dirty so i could not tell a difference. Gtraptor said the cause was from people applying to much KN oil to thier filters.
i have a problem typing the word thier...I mean "their"

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1966 mustang 302 ho b303, 650 double pumper, t-5 conversion ported e-7 heads, 1.6 motorsport roller rockers, 3:55 posi trac, holley red electric fuel pump. 1994 lazer red 'ol red' very dependable daily driver mostly stock(but not for long)