Trial Number 8

Ceramic, Painted steel, and polycarbonate coupons were weighed and then coated with Hucker's Soil Formulation (Creamy peanut butter, salted butter, Arrowhead Mills stone ground wheat flour, egg yolk, evaporated milk, distilled water, printer's ink with boiled linseed oil, Shaws saline solution) using a hand held swab and allowed to dry for 24 hours at room temperature. The contaminated coupons were weighed again to determine the amount of soil added. All three cleaners were diluted at 2.4 %.

Three coupons were placed into a Gardner Straight Line Washability unit. A Kimberly-Clark Wypal reinforced paper towel was attached to the cleaning sled and soaked with 5-7 sprays of cleaning solutions. Each coupon was sprayed 7-10 times with the same cleaning solution. The cleaning unit was run for 20 cycles (~33 seconds). At the end of the cleaning, coupons were wiped once with a dry paper towel. Final weights were recorded, efficiencies were calculated and recorded.

All products were effective at removing more than 85% of the Hucker’s soil from two of the surfaces (painted steel and polycarbonate) using manual wiping. However, MD Stetson PC 220 and RMC DFE 401 were not effective at removing the Hucker's soil on ceramic surface. The table lists the amount of soil added, the amount remaining after cleaning and the calculated efficiency for each of the ceramic, painted steel and polycarbonate coupons cleaned.

MD Stetson PC 101 cleaner was effective to remove the Hucker's soil on various types of surfaces. Next step will be to evaluate products at the same concentration for bathroom cleaning.