My wife HATES the smell of solder. To remedy this, I have bodged together a box, a couple 120mm PC fans and such. But have run into a problem of figuring out a decent material to use for the filter media. All my searches only show how to repurpose existing filters for other uses, but nothing on creating your own filter media. Mostly I am doing this because I am poor, partially because I am curious if a filter can be put together with free/scavenged materials. Existing ideas include re-using brita water filter activated carbon sandwiched between cotton and bug-netting. If anyone else has some ideas I am open to suggestions.