Our youngest baby girl makes an electrolyte powder. I use a 2-3 pinches in 25 oz water when I feel the need.

This recipe is similar to what she makes and puts in a rubbermaid container. We leave it unflavored.
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In the many years we spent mixing electrolyte drinks at home before LMNT existed, we made many messes and had quite a few misses, but we also came up with several great recipes. If you prefer to source your own electrolytes instead buying LMNT, jot this down and grab a kitchen scale:

2,500 mg sodium chloride (for 1,000 mg sodium)
385 mg potassium chloride (for 200 mg potassium)
390 mg magnesium malate OR 265 mg di-magnesium malate (for 60 mg magnesium)
Or, to save time, you can measure 30 servings at once!

75 grams sodium chloride
11.5 grams potassium chloride

11.7 grams magnesium malate OR 8 grams di-magnesium malate.

Once you’re finished measuring, be sure to mix your ingredients together thoroughly. Then, simply weigh each serving out — if you used magnesium malate, one serving weighs about 3.3 grams; if you used di-magnesium malate, one serving weighs about 3.15 grams.
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Since we leave it unflavored, there are no sweeteners.

It just tastes like salty water.

Good luck.

Happy birthday

Best wishes with that, Carolyn. My father had one. For him it was very challenging. I hope you are having a better time of it.