I get chronic sinus issues in the winter time that seem to coincidently start around the time when furnace use starts. I have some home remedies that help, especially the use of a steam inhaler. Allergies and our cold dry air here are probably factors. I've talked with my primary doctor who wasn't much help and have so far resisted seeing a specialist. I have considered using one of the services that does duct cleaning. Based on their ads there must be all sorts of monsters in the duct works, but have wondered if it's a come on. A cousin has similar problems and had his duct work cleaned. He said it was sort of expensive and didn't help, but that's just a sample size of one.
Has any one had experience with duct cleaning and if it really does anything useful or helpful?