I had a really strong bad smell that i couldn't figure out. Turned out to be truck fuel additive which got on my gloves that were kept in my side box. The smell just drifted right in. I do like the vent air fresheners, found some mult-packs on Amazon that didn't cost too much. I also like the small can air fresheners. I have drink slots by my sleeper windows. I place one in each hole. When the window is open or fan on, it circulates a nice sent. Having a dog with me, vacuuming at least 1x a daily is a normal routine for me. I have a nice rechargable Dyson Vacuum that I love for this task.