If you feed fondant rather than syrup in the autumn, or provide underweight colonies fondant in the spring, or use fondant to feed mini-nucs for queen rearing you’ll inevitably end up with leftover lumps. Some of these will be dry and pitted, some will have bits of bees embedded, some will have brace comb or lumps of propolis adhering. All can be used.
Just mix these leftovers 1:1 by weight with hot water to make syrup for spring feeding or – in my case – for Bailey comb changes. Fondant is about 85-90% sugar, so a 1:1 mix is actually a bit thin, but it saves doing the maths accurately and will all be used. By mixing with boiling water from the kettle everything should be sterilised.
Just remember that all that wax and propolis will melt in the hot water and will form a scummy ‘tidemark’ around the edge of the saucepan. Ideally use a saucepan dedicated for the task or, like me, discover that a half cup of washing powder and some elbow grease will restore the pan to its original condition.