Add lemon rinds to a jar and pour over the vinegar until they are covered. Allow them to sit in the mixture at least 48 hours and up to a week.
Strain out the lemons, and add the vinegar mixture to a spray bottle until half full. Fill the rest of the bottle with water, and the teaspoon of Castile soap. You now have a gentle lemon cleanser. Make sure your countertops or wood sealant can take lemon as it can be quite abrasive.