Heat and grime can cause wood furniture to look dull and dry. A fix is to combine 2 parts of olive oil with 1 part of lemon juice in a container, shake well, and dab on a soft cloth and gently buff onto the wood to restore the luster. The oil restores the wood while the lemon juice dissolves grime. For stubborn areas, let the mixture sit on the spot for a few minutes giving the lemon juice to work to break down any residue.