Eliminating new trailer smell?

When I bought my 12 yr. old 5th wheel it had that new smell also. I tried the odor absorbers which were somewhat effective until they reached the 2 month mark and then no longer worked. I bought several small pumpkin spice candles and placed them in different areas from front to back. This works very well. Now every time I open the door to go inside it smells like fresh baked pumpkin pies inside the trailer. Just keep in mind, get a scent that you really enjoy smelling. Worse case scenario; if you don't like the scent burn the candles and try a different scent. I have had the candles inside the trailer for over a year now with no lessening of the scent. If you decide to try this route, I do suggest that you find some candles that are wrapped in plastic. Just tear off a portion of the plastic on top but leave the sides and bottom wrapped in plastic. The reason for this is during the summer, if your trailer stays shut up, you don't want the candles to inadvertently melt when the temperature rises inside a closed trailer. Hope this helps and good luck.