QUICK QUESTION...QUICK ANSWER NEEDED! AUDI A3 2.0 TDI (8P) Is it worth taking off the ''EGR'' off my car and cleaning it? or should i leave it alone. vag-com was showing a duty cycle of 85% which i assume is ok. I know they get alot of build up so was wanting to know YES OR NO ? ALSO WHATS BEST CLEAN IT WITH ? ......FAIRY LIQUID ??????