Everybody knows WD-40 is the go-to product for silencing squeaks, displacing moisture, preventing rust, and loosening stuck parts. You probably have a can sitting in your garage right now. It has a ton of uses, but it’s no panacea. In fact, there are a some jobs that the lube will absolutely ruin. Your house is the biggest gadget of all. A Gizmodo Home Mod shows you how to recharge it, clear its cache, and update its operating systems. 1. Lube a shovel. Spray WD-40 on a shovel, spading fork, hoe or garden trowel. The soil slides right off—especially helpful when digging in clay. 2. Clean tile. The spray removes spilled mascara, nail polish, paint and scuff marks from tile floors, and also help you wipe away grime from the grout lines. Clean up with soapy water. 4. Unstick gum. A squirt makes it easier to pull gum out of carpet and even hair. It’s better than cutting out the gum and leaving patchy carpet or a bad haircut. 7. Erase crayon. When crayon ends up on toys, flooring, furniture, painted walls, wallpaper, windows, doors, and television screens. Spray on WD-40 and wipe it off. 9. Get rid of rust. Spray and rub away rust from circular saw and hacksaw blades. It...