When preparing spoon sweets we must be sure that the syrup is just right neither too watery nor too thick. Usually if they are not thick enough if they are left outside the refrigerator they will get mildew and if they are too thick the sugar will crystallize.
In any case there is no need to throw them away because it can be fixed. In the first case remove those which have mildew and boil again adding sugar.
In the second case boil again adding 1 cup of water and 1 tablespoon lemon juice.
If you liked this see other relevant posts:
Glyko Kerassi (Cherry Spoon Sweet)
Glyko Karpouzi (Water Melon)
Glyko Nerantzi (Bitter oranges)
Glyko Bergamonto (Bergamot)
Glyko Vyssino (Sour cherries)
Glyko Karydaki (green immature walnuts)
Glyko Kydoni me amygdala (Quince with almonds)
Glyko Kydoni me kastana (Quince with chestnuts)
Glyko Milo (Apples)