Things You Will Need
-
Push a lemon down on a cutting board and roll it on the board at the same time.
-
Slice your lemon in two parts. Squeeze the juice from the parts of your fruit into an empty container. Take out the pits from the fruit.
-
Place a single cup of water in your lemon juice. Then, put the mixture in your microwave for 60 seconds on high.
-
Take out your container from the microwave. Put your sponge in the liquid in your container to remove any extra liquid.
-
Put the mixture on the location where you want to obtain the fingerprints. Wait for at least 60 seconds to give the acidity from the lemon a chance to break down the oil from the fingerprint. Then, use your cotton to absorb the prints.