Based on client request four products were selected to clean three contaminants. All four cleaners were successful in removing over 90% of the cutting fluid. All cleaners except Vertec BioGold removed over 99% of the quench oil. Only Citrikleen was successful in removing over 85% of the grease during the 5 minute cleaning. During both trials, the effectiveness of the Vertec Bio Gold 2 was observed visually to be effective in removing the quench oil from the coupons. Despite these observations, the calculated efficiencies yielded different results. From the results of this trial, it appears that a more aggressive rinsing methodology will help to eliminate the cleaner residue from the surface of the parts.