So Aaron mentioned a bunch of stuff here, and it seemed to me that at least half those things are going to be things that I need to look up because I have no clue. In order to make the thread useful, I suggest youtubing an answer or providing a detailed description of the solution rather than asserting that "everyone should know x", where such explanations are necessary. So, for instance: Knowing whether your dryer is running through a second lint trap/dryer vent built into your house is really important, since that also needs to be cleaned regularly. Mine is above my dryer, and it looks like a little box with a porthole and knob on it on the dryer hot air pipe. Aaron mentioned dishwasher filters. Mine are not this brand, but both of them looked pretty much like the one in this video. Now they are clean.