I tested out three window condensation 'hacks' to see if any of them work
Briefly

Using washing-up liquid on windows is a common myth for reducing condensation, claimed to form a barrier; however, it did not affect the condensation levels.
Vinegar has been praised for its mild acidity that can dissolve minerals, and while it seemed to reduce condensation levels, its effectiveness may vary.
Read at Homebuilding & Renovating
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