I'm sure this will get zero responses, but I thought I'd give it a try anyway

Have any of you ever had the air ducts in your house cleaned? With winter right around the corner, I was thinking this might be a good idea. My house is only three years old, but I'm sure there are still some construction remnants in there. I've tried a vacuum hose, but obviously, that only goes so far.

In a somewhat related question, how about your dryer vents. Have you ever had a service come and do this for you? I'm too chicken to mess with this myself.

Just wondering about the cost and if you felt it was worth it. Thanks.