I use Chemical Guys sents and Poorboys. I have found that neither last very long though. The CG's NEw Car sent seems to last the longest, but I'm not really fond of the smell, but it does last. The DP line works great but the sent does go away rahter quickly. I have also treid the Dakota bombs and sprays and they seem to last the longest and really do work on bad odors, but I guess if you discharge a whole can of any sent it would last longer. Maybe some company will read this post and make a line of scents that really do last more than a couple of hours.