John White shows how to clean and sharpen your tools by using a file and WD40. He also advises to repair the wooden handles of your tools to prevent injury. Run the file along the back and sides of the shovel. Leave the front part smooth. Make sure you remove any mud to prevent corrosion. Use steel wool to achieve this as well as WD40. Use the file to sharpen the edges of your hoe and again clean with steel wool and WD40. The file is also useful for sharpening trimmers. Clean all the dried plants off the trimmer. Applying these tips will prevent having to replace tools prematurely.