We are finally getting the time to really clean our BH. We gave it a quick wash before we took off but now have about 5,000 miles on it and road grime is showing. We learned from another site about bounce taking off the bugs, it worked OK but it was still a lot of hard work, we’ll take some preventative measures before we go out again. My problem is with the black marks on the rubber weather shields where the slide outs come in contact with the trailer when they are closed. I can’t seem to get off the black marks. I’ve tried the usual “soap for RVs” and the bug and black mark remover stuff, and even used the bounce, it’s coming off but its taking a lot of rubbing. An hour of work got only ½ of one of the runners (and it still could be better). If anyone can give me some ideas we’d appreciate it. Thanks to all for your help.