If a small splinter in your hand is too deep to get out there with tweezers: put some butter on it. The splinter then crawls out. Repeat if it does not work right away. Tip of my grandma!
If a splinter is too deep to remove it with tweezers put a small piece of bacon and stick a plaster over it. The splinter will come upwards.
Simply remove splinters painlessly, useful for children, take a piece of leek leaf paste it on with a bandage after one night, the splinter out.
Use a piece of sandpaper and rub obviously in the right direction and the splinter comes out without pain.