IS250 2015. 46,000 miles... I noticed that there's some kind of damp (not wet) residue after driving. This happened and I used some window cleaning to clean up the plastic so it was dry. Then today I noticed it again. Here are some pics for reference. What can this be? Also, is the transmission supposed shift with a swoosh noise? When I shift from drive to Neutral for example, there is annoying. Is this normal or is it supposed to shift completely quiet? on Sports mode with sudden fast acceleration especially from 2 to 4 RPM rapidly with hard acceleration, the car sometimes jerks a little bit.