Sage is right about the candles & the fresheners. There really isn’t any safe at all.
The best thing you can do is clean with vinigar. It only stink when you use it but not after & it neutalizes any odours in the house. The next best thing is to open up the house as fully as possible, when you can for fresh air.
Buy only 100% natural oils (not fragrants) or sweet spices, mints lavender etc & boil them in a pot of water or add them to a bowl of hot water & disperse them around the house for a nice scent.