Anyone with sunbeam snake experience?

Hi,

I just adopted a sunbeam about a month ago and am getting rid of its RI, but now the second thing worrying me is the fact that on the last week of March I believe he went into blue, but he has yet to shed and it's been 4 weeks. He's only 3 feet long.

I'm wondering if any keepers of this snake on here have experienced this, or if you've had moments where you thought they were going into shed but they weren't? (He had begun to get hazy/foggy, but didn't become full-blown blue like sunbeams are famous for doing) I've begun soaking him right now, but no shed yet and I've dug everywhere in his tank. So I'm beginning to either worry or doubt myself.

He's got several inches of substrate with a water bowl and humidity at 99%. Temp is 81-90 during the day.