the snake shed and the cham shed are very different. While they both get faded colors and slight wrinkles in the skin the similarities end there. I HATE when my snakes go into shed and then weekish that it does take. IDK what kind of snakes you keep but cleaning a female retics cage while she is in shed usually ends up with donating blood lol.
Your little guy looks like hes pretty close to getting new colors

i have had a carpet that got lathargic when going into shed, and i had a veiled that you never knew he was going to. My little panther (while ive only had him since sunday) started shedding today and got lazy, but my UVB bulb also went out today so i dont wanna say for sure its the shed.
Up your misting schedule a little bit till he started breaking his sheds loose (youll know trust me) and enjoy the next round of pretty colors!