To test for soft ball sugar, use a clean spoon to remove a little of the mixture and drop into ice cold water. Allow to sit in the water for 20-30 seconds. Remove the sugar from the water with your fingers, if it is solid, but still soft and malleable it is ready. If runny and can not be handled, return to the heat for a further 2-3 minutes. If it set's hard, it has reached too high a temperature and you will need to start again