I LOVE my new bed release!
Earlier I've used Blue Sludge, simply 'cause that's what came in the beginners pack. To sum it up - Blue Sludge is not good! You really need to be strong to get the beads of the mandrels (I usually have to ask my husband for help) and as you have to put so much energy to it, half of the mandrels become bent in the process. :(
But now I've found Foster Fire. And sometimes I don't even have to use pliers to get the bead of!
Thart Blue Sludge is going down the drain. I'm a Foster Fire believer!