the soak should be a last resort when the shed is already going badly and in flakey pieces. The reason for this is they have certain oils on their skin that help them shed when soaked these oils are washed away. At this point you just need to keep the humidty bumped up to around 60-70% untill your bp sheds it's skin. It is possible it will have a bad shed for its first shed, but thats okay it happens just make sure you are providing the proper cage conditions suchs as temps and humidty. as for feeding i offer food to my bps whether in shed or not if they dont eat its still no big deal try again next week.