LiquidFix Door, Lock, and Hinge Lubricant | 4 oz Dropper + 0.5 Needle Combo Pack – Door & Sliding Long-Lasting Squeaky Oil for Hinges Glass Doors

Customers find the lubricant works effectively on doorknobs and hinges, removing squeaks completely with just a few drops. The product is easy to use, with one customer noting how the key slides in like a new lock, and they appreciate its versatility, with one mentioning it's perfect for everyday fixes. They like the applicator, with one highlighting how the needle tip allows precise application in small areas, and find it worth the price, with one noting it will last for 50 years.