Inside Dryer and Dryer Vent
Car cabin filter
Clean Window Weep Holes or Invite Rainwater Into Your House
Many sliding windows and vinyl replacement windows have weep holes on the exterior bottom of the frame. These holes are designed to drain away rainwater that can collect in the frame's bottom channel. Weep holes can get plugged with bugs and debris, and if that happens, water could fill up the channel and spill over into your house.
To see if your weep system is working, simply pour a glass of water into the track or spray the outside of the window with a garden hose. If you don't see a steady stream of clean water exiting the weep hole, poke a wire hanger into the hole, or spray it out with compressed air, and wet it down again. If the little flapper (designed to keep out driving wind) is stuck shut, it can be removed with a putty knife and replaced.
HVAC Condensate Line
Bath Fan Grill
Check Your Water Heater