My perferred approach...
1) Have your own distinctive cologne, use it every day in the morning.
2) Wear an undershirt that will pick up that sent
3) When you get there promptly disrobe and keep your clothes from picking up any new scents
4) Prior to departing shower as described by others, suggest t you make sure to use the soap at the hotel with the least fragrance - typically the hotel provided bath bar
5) Dress and refrain from picking up new scents
6) When you get back to your car turn the heat and fan up all the way (this will help dry any residual water left from the shower)
7) drive at least 15-20 minutes in that heat
This will cause you to sweat, which will mix with your cologne from your underwear and will provide a mask from any remaining smells.
If you are anything like me the residual smells you are noticing are from the inside of your nose and are not actually there...
Mine better half has a great sense of smell and has never acknowledged any remaining smell.
That said the dry sauna effect does tend to kill a little of the post coitus buzz.
-- Modified on 6/3/2017 12:44:53 AM