dirt

While vacuuming today we decided to take off the floor registers.  Whoah.  Scary stuff.  One of the registers had about two inches of dirt in the ductwork underneath.  I also found rubber bands, cigar wrappers, washers, sticks, a piece of drywall, and a Lego spear.

Then we vacuumed under the fridge.  Even scarier.  The coils were enrobed in probably an inch or two of dust.

Did the previous owners just never clean anything?