Back in February when CV started I stashed away plenty of cash but I've used almost none of it. Maybe $100 in the past two months. Everything goes on plastic and some stores prefer it that way.
Early on, I tested whether paper money could be cleaned in our microwave without starting a fire. Dampened a brand new $100 bill, the kind with lots of metallic threads, and heated on high for a minute. Result was a toasty hot and presumably sterile Franklin.
Shoe boxes [plural???]. I keep most of mine in one file folder.
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Because the Good Life is Just a Pump or Two Away