Is Tea Tree Oil Safe to use ? September 29, 2014 No Comments Yes, Tea Tree Oil is safe, it contains natural germicides. Previous Post Next Post You may also like September 29, 2014 How should a residential HVAC system be cleaned? September 29, 2014 Do we have to cover all of our furniture before you come out to clean the ducts ? May 18, 2015 Do you provide duct replacement services?