Update: Vet says to let it wait a day, check for any cleaning products he might have gotten into and then bring him in tomorrow if the drooling continues.
Kitty is drooling a lot tonight. More than his usual ‘so happy to see you’ drops. He’s not sneezing and the liquid is clear and he is still playful and active so I think those are good signs. Gotta take him to the vet tomorrow morning.