It's really easy. Dissolve 1 part granulated white sugar into 4 parts water. You'll have to heat it to get it all dissolved. If you think you'll be using what you make over more than a day, bring the solution to a rolling boil and then simmer it for 5 minutes. If you only make enough for the day, you don't need to boil it for the extra 5 minutes.
Cool and store the solution in the fridge.
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