Remove the bolt and then clean the hole out with a wire brush or a round file. Then thread the bolt into the hole as far as it will go. Put a little grease on the bolt and then put a bead of silicone sealer around the bolt hole. Thread the bolt into the hole and tighten it down.
The most common cause of an overflowing toilet is a faulty flapper. The flapper is the rubber piece that covers the hole in the bottom of the toilet's tank. When the flapper is in place, it keeps the tank's water from flowing into the bowl.
You can fix shallow tears in leather by using saddle soap. You can buy leather saddle soap from most saddlery stores or online. To apply, apply a generous amount to the tear and work the soap into the leather with your fingers.
First, try a repair kit. These kits are made specifically for repairing leather and are sold at many department stores, craft stores, and online. If the scratch is still visible, try buffing the area with a soft cloth and mink oil.
When you first start to notice the problem, you can try to clean the keyboard with a can of compressed air. The dust and debris may be the cause of the problem.