Dry it out... leave the card door open. You could put it in a sealed plastic bag with desiccant packs.
I had this happen to a phone (it fell in a lake). After roughly three weeks... it started working again. The desiccant absorbs moisture out of the air and makes the air (in your sealed bag) *extremely* dry. The drier the air, the faster water will evaporate into that air.
I'd put the bag (w/camera & desiccant inside) in a warm-ish place (not hot).
It is probably dead. I had the same thing happen, though it was salt water. It never came back.
Salt water is a much more serious problem than fresh water. It's far more conductive and corrosive; drying the camera out doesn't get rid of the salt; and the salt reabsorbs water from the air when you're in a humid environment.
"You could put it in a sealed plastic bag with desiccant packs."
You can forget this. It won't work or help. Neither will rice in a bag.
What might work is a warm heating pad, not hot, warm. It will take a long, long time. So don't get in a hurry.
"Mist while hiking got my T6 camera wet ..."
Mist? How wet? Mist has no pressure involved with it. If it just got the outside wet, you might be able to save it. If 'wet' means water, not mist, got inside, it is probably done. Water and cameras do not do well together. Canon is not likely to even service or repair a camera that got wet because they can not guarantee something deep inside won't fail later.
Did you happen to buy Canon CarePak or perhaps check your home owners policy.
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.