The odors are in your carpet, wooden flooring, window hangings, furniture, etc. A candle will only mask the odor not get rid of it. If your house is closed up for a long time the odor will get worse. We had an odor, I had the carpets, wood flooring and furniture steam cleaned. Still an odor, cleaned the blinds and other window coverings, washed all quilts on beds and couch, got rid of throw pillows. Still an odor, got new bathroom rugs, tada, no more odor, it was the rubber backing on the rugs. At least my house is really clean and smells good. A friend had the same problem, she has an older home, turned out the wood in her kitchen cabinets were rotting due to years of moisture from steam, grease and dishwasher. Expensive fix! The cabinet maker advised her to try sanding them and apply varnish, she opted for a kitchen remodel.