[Pablo1995]

I always order cleaning services for my home, but recently I noticed that the ventilation was not working properly. The extractor hood is not as efficient as it used to be, and the house has become more humid. I wondered if it was possible that the ventilation needed to be cleaned. Does anyone have any experience or advice on this issue? How do I know if I really need to clean the vents, and what are the signs that this has become a problem?