Trial Number 2

Four supplied cleaning products were diluted to vendor recommended concentrations for bathroom cleaning. Each product was diluted with DI water. Twelve preweighed ceramic coupons were coated with SSL Soil 1 (Bathroom soap scum: Vaseline Dry Skin Lotion 21.4%, Dial Clean Rinsing Body Wash 14.3%, Market Basket Shampoo & Conditioner (Pert) 28.6%, Soft Soap Natural Liquid hand soap 21.4%, Coast Deodorant bar soap 7.2% and Water 7.1%) 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. Photographs were taken.

Three coupons were placed into a Gardner Straight Line Washability unit. A Professional Painter's Rag 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 and a second set of photographs were taken. Efficiencies were calculated and recorded.

Only one product was successful in removing over 85% of SSL Soil 1 from ceramic coupons. Two removed over 80% and one removed less than 60% of the soil. Table 1 lists the amount of soil applied and removed.

Table 1. Soil Application and Removal

The overall cleaning performance of the four products tested on SSL Soil 1 are as follows:

Three of the four meet the 85% soil removal rate. Only one product, Super H2O2 was successful on all three substrates tested. The one product that did not meet the overall passing criteria was effective on two of the three surfaces tested.