Which of the following is NOT a method of enhancing latent fingerprints?

Cooling is not a recognized method of enhancing latent fingerprints. In forensic science, latent fingerprints are typically enhanced using various techniques to make them visible for analysis and comparison.

Swabbing with Ninhydrin is a widely accepted method used primarily on porous surfaces. Ninhydrin reacts with amino acids present in the sweat found in latent prints, resulting in a colored compound that highlights the fingerprints.

Utilizing UV light sources is another established technique. Certain substances in latent prints can fluoresce under UV light, making the prints more visible against the background surface.

Applying magnetic powder is also a common method for developing fingerprints, especially on non-porous surfaces. This technique involves using iron-based powders that adhere to the oil and moisture in latent prints, making them stand out.

Since cooling does not facilitate the visualization of prints or enhance them in any capacity, it is the option that does not belong in the context of methods used for enhancing latent fingerprints.