need help with decarbing a cart

sooo i don’t got a battery and i normally just do edibles as i don’t really like to smoke cause lung issues but i do need some help with the smell as my roommate would get pretty pissed off with the smell if it’s strong any tips cause idrk what to do im pretty new to this stuff 🙏 i saw some stuff about mason jar and a cap but i dont got a cap i do got tinfoil i heard works and simmering lemons or cinnamon sticks can help mask it up i just dont want the smell to be around when he wakes up is all and i dont got another place sooo pls help 🙏