Core Points - The article presents five effective life hacks supported by scientific principles, aimed at solving common everyday problems. Group 1: Life Hacks - Repairing Data Cables: Heat-shrink tubing can be replaced by the plastic film from beverage bottles, which shrinks when heated, effectively covering damaged areas [1]. - Distinguishing New and Old Batteries: A simple bounce test can differentiate between new and old alkaline batteries, as new batteries do not bounce as high due to their internal structure [3][5]. - Removing Super Glue: Nail polish remover containing acetone can dissolve strong adhesives, while minor residues will eventually come off as skin cells renew [6]. - Checking Pan Temperature: Dropping water onto a hot pan can indicate its temperature through the Leidenfrost effect, which occurs at around 193°C [9]. - Removing Red Wine Stains: Using a clear spirit with about 50% alcohol can effectively remove red wine stains due to its ability to dissolve anthocyanins [10].