What is it with the lemon juice and isopropyl alcohol?
While the leaked battery paste is potassium hydroxide, it is water soluble as are the corroded metal; if you think that simply washing it away is not good enough and you want to use kitchen ingredients, then why not use acetic acid (white vinegar)? Why exposé the circuits to lemon pulp and all the other junk from a squeezed lemon? Secondly, the isopropyl alcohol is only 30% water (or 10% using the 90% isoPrOH solution); is this to dissolve grease? Plain water will dissolve and wash away the corrosion, so the alcohol evaporates more quickly and this does what? Clean away the "germs?" Yes it dehydrates and denatures the viral and bacterial cell walls, but do circuits care?
Please explain the chemistry, physics, and electronics behind this voodoo mixture