The fan in my kitchen works well. I am disappoint with the level of noise from the fan located in my hallway. The fan in the bathroom has become very noisy but I do not know how to take it apart go see if it needs cleaning. The fans are. Very audible at night and keep me awake. I wish I did not have the bathroom fan I think that it is the noisiest. Charlie busby knifes about these problems. Thank you.