Have a 41 yr old home that in the past summers when it has been very hot during the summer, has developed black stuff on top of air vents and ceilings in several of the rooms.
Has anyone used a reputable air duct cleaning company to clean out the vents from an old house like this?
I have used diluted bleach water and scrubbed the area but it comes back again and also a solution of water and borax, but the ducts need cleaning where we can't get to.
I have asthma and use hepa filters and a good a/c filter regularly and change it when I am supposed to. We have had an extremely dry spring and summer and now the rains are starting with the fronts and it has been in the triple digits in temps until last of Aug here in SCentral Texas and now it has been very humid and dry all this week and it seems the a/c has some condensation.
Please, if anyone has used the duct cleaning, respond.
Thank you, Michelle