There are still quite a lot of places in the US where either by State law, or the terms of your apartment rental contract, you can be punished for toking up in your own place.
Odor elimination sprays help but your best bet is changing your shirt and washing your hands/face at least
It's not too strong after a little while, just give yourself time if you need to. But most people just don't care as long as you don't make it a big deal.