So I had my glass carboys sitting in the garage with oxy clean soaking to clean up, and along comes my 18 month old who thinks its fun to put sidewalk chalk in things!
I find it say a month later, no big deal you think, that will come right out, wrong--some kind of residue I cannot get out of there from the chalk, one thick line of it near the bottom and a little film everywhere else. Not PBW, not some other dish soak cleaner--any chemical experts know what might get this stuff out? I am thinking only a stronger acid and that may not be worth it IMO.
From what I can gather, the sidewalk chalk is calcium sulfate (gypsum)-- however, I don't know how it reacts with the percarbonate oxyclean over time to precipitate out like that and stick to the walls. Would wipe off if you could get in there but obviously not.
Anyone know for sure?
I find it say a month later, no big deal you think, that will come right out, wrong--some kind of residue I cannot get out of there from the chalk, one thick line of it near the bottom and a little film everywhere else. Not PBW, not some other dish soak cleaner--any chemical experts know what might get this stuff out? I am thinking only a stronger acid and that may not be worth it IMO.
From what I can gather, the sidewalk chalk is calcium sulfate (gypsum)-- however, I don't know how it reacts with the percarbonate oxyclean over time to precipitate out like that and stick to the walls. Would wipe off if you could get in there but obviously not.
Anyone know for sure?