I found my husband vacuuming the a/c air filters the other day. It’s not like these things are super expensive but for some reason, he decided to vacuum it instead of change it out. I will grant you that shopping for them can be a little hard since you have to know the measurements before you go out. I’m notorious for forgetting that kind of detail and then bringing home a completely different size. Which then goes into the trash. I suppose instead of calling him cheap (or me forgetful) I should think of him as helping the environment (which means I’m not – I suppose our carbon footprints will cancel out).