If you need to hacksaw through a fastened pipe or rod, but the space above is cramped, try this: Remove the hacksaw's blade, straddle the pipe with its frame from below, then reinstall the blade upside down. The teeth of the saw will cut through the pipe from the opposite side. In many cases this trick will allow you to complete a cut that would be otherwise impossible.
Clean the lint filter in the clothes dryer after every load to improve air circulation. Remember to regularly clean the lint from vent hoods, too.