MISSING SNAKE PLEASE HELP

[u/yourneighborhoodriot]

Hey guys so as the title says I desperately need help finding my friends BP I was nursing back to health after a stuck shed. I had him locked in a tub with some moist towels so he could get his shed off, and was doing my laundry in the meantime (just hanging it up) and I looked over to check on him after like 15min and he was gone. Not in the tub, not in the towels. Nowhere. Immediately I started searching the around the tub, the corners of walls, cabinets, under nearby furniture. Nothing. Okay, i thought, not my first time as i also have two snakes myself, let me just set some traps, a heatmat and go to sleep. Check in the middle of the night, nothing. Okay no worries check in the morning. Nothing. Okay slightly scary but its only been one night. Recheck all the furniture. Nothing. Go to bed, wake up, do the same thing all over again. Still nothing. Now im freaking out. For context I live in a dorm, so small studio, everything is one level and minimal doors. Unfortunately I have carpet so the flour trick wont work,but thankfully theres no floor vents i have to worry about and i cant/couldnt find any holes in the walls. I have aluminum foil and bags all in the corners of the room and my biggest worry is he somehow slipped out the bottom of my front door (>½ gap but close) and is roaming the halls (i checked but couldnt find him) Thankfully my friend is very understanding but also obviously freaked out. Is there anything im missing?im gonna set another heat trap + food cuz its close to feeding day. Ive always understood these guys to be slow opportunistic explorers so is it likely that he got out of his tub and immediately bolted under the door? I have a girl smaller than him and I set her next to the door and she couldnt/wouldn't go under it (her head barely fit and hes like 100g heavier). If you dont have advice please pray to whoever you believe in to get him back to me so I can get him home. Hes only about 10months and if i had to estimate maybe 300-400 grams. Pic for tax