Daily check in on my stout, seems to have gotten a bit excited in the night.
E1: Changed out the airlock, sanitized, the whole shebang. Came back 5 minutes later, it happened again lmao. Swapped in another clean airlock, this time with some vodka in it to see if that helps.
E2: Swapped out the airlock again, this time with more vodka, hope that helps keep the bubbles down. This is so exciting!
E3: I've been checking back every hour or so, it's blown over again at least once. I guess I should be happy that my beer is fermenting so actively lol. Looks like I'm gonna be swapping out the airlock every few hours today, until main ferment dies down.
This is totally normal! You just left too little space on top, too vigorous yeast, too high temperature. It raised to the top and subsided later. Wash your lock and move on; if any contamination got in (unprobably), it got eaten brutally by now. And wash the outsides asap, every day would make it nastier.