alice19 - I can't stand insects in the house. It also just appeared in my house. My friends said it's possible the insects are in the ventilation. But I don't know how to clean it.

abragih - It's easy. I usually order duct cleaining in Mississauga. We do not have special equipment and detergents to do it well. Therefore, it is necessary to order a company that deals with this professionally. I order on the site https://comfortclean.com/air-duct-cleaning-mississauga/ . I advise you to try it too. I have been using their services for over 3 years and I am satisfied.