The wipers on my A4 convertible have been operating slower that normal for a couple of weeks. Checked the blades themselves and they seem ok. I did spray the arm linkage with WD40 a couple of times hoping it would free everything up.

Last night I used them and they actually stopped mid wipe while I was driving, then slowly returned to their home position after about a minute or so.

any ideas? Is this a common issue? Removing the wiper motor and arm linkage looked like it will be a pain to do…