I got a Mathmos Rainbow Jet yesterday and it was flowing lovely in the shop but when I got it home and switched it on it didn't flow much at all.
It melted the wax and looked as if it was going to move but the wax just didn't break off and move upward it just stayed in the dome shape.
Every so often a small piece would break off and make its way to the top but thats it.
I turned it off and left it overnight in hope that will help it and just turned it back on now to see if it makes any difference, If it doesn't what can I do?