Frugal Friday

Today for the first time I"m participating in Frugal Friday. 

I don't know if this idea is new to anyone else, but it was new to me about a year ago.  I have quite a few pets, and I was having to change my filter for my central heat/AC quite often.  I decided, "Why not try vacuuming out the pet hair and dust that has accumulated?  That way, I can stretch the filter for a couple of months instead of twice *a month*. 

Before:

And, *after*:

Does anyone else vacuum their filter to make it last longer?