Hi, what do you guys recommend for cardboard cans, after you have drained them and they get that ring around the bottom, and you can wipe it away 10 times, and it still comes back?
Ive tried putting them on napkins, and stuffing Kleenex inside, and still leaks.
I find if you drain a can before it leaks, when full, it stays better and you don't get the ring at the bottom.
...I'm just throwing this out there, but has anyone tried using the granular stuff they use to soak up oil/gas drips/spills at the gas station - Oilsorb(?) or something like it?...I wonder if suspect composite cans were drained and then surrounded by that material if it would draw out the oil?...would it be safe for the printed surface of the cans?
