Trying to save some money on buying Splenda packets by buying sucralose powder and mixing with water. This works great and is waaaay cheaper - 10x cheaper than buying the packets!
However, after two weeks, I noticed my solution, which I keep in an eye-dropper bottle, developed fungus floaties and so I had to pour the contents of the bottle down the drain.
Can anyone recommend a method of preventing things from growing inside my solution? Is there something people use for this sort of issue? Some kind of available food preservative? Obviously, whatever the solution turns out to be, it has to be safe for human consumption.
Thanks in advance for your help.