So i'm feeding my BPs today and the top Tub of my Animal Plastic Rack system will not come out. I've looked using a flashlight to see if something (not sure how) is blocking it from coming out but both sides and the top I do not see anything. The only thing I can think of is it is blocked from the bottom shelf of that rack where the groove is that the heat tape is in. Any thoughts ideas? other then removing the top of the rack to get the tub/snake out any ideas?