I haven't been on in a while, and I have no idea how to change/cure it. Can anyone help?

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You need a , I believe. :3

Trying that, thanks. :)

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Okay. c: No problem.

Follow-up: where do I find Ecks and her machine so I can get a potion to make the cure? It's been months and I can't seem to remember >.<

Pretty sure that was only available for the event. You'll need to buy them from user shops. Just search "Liquid-Filled" and buy one. Color doesn't matter

Ah, right! I couldn't remember the name, either, and the shop search is being wonky. I put in "potion" and can't scroll down to look for a familiar name. Thanks so much!