Highway driving total 11 hours in the dark and 5 hours in the light. Max speed 120 km/h. Easy-peasy cleanup! Before trip: 1. Wash and dry car. (Who wants to drive in a dirty car?) 2. Apply Liquid Glass LG-100 Ultimate Auto Polish/Finish. 1000+ reviews! https://www.amazon.com/dp/B0002JMIEK/ref=cm_sw_su_dp After trip: 1. Wash car under shade, as usual. No need to "extra scrub" the bugs away. Just soap as you normally do. 2. Rinse car with hose. Bugs just slide off, even those on the front license plate. NOT ONE LEFT. NOT. EVEN. ONE. Car as clean and shiny as before the trip started!