I have taken my bike to the car wash. One year I cycled all winter on a road bike. Other times we have traveled over 1000 miles on the interstate with some bikes on the top rack. They get full of bugs that way. I usually clean my bike in the shower during the winter. When I do use the car wash, I do not use the high pressure mode. I am mostly just getting all the slush and salt (or bugs) off the bike.