Eighteenr brass coupons, three per soil per cleaner, were weighed to record their initial weights. The coupons were then soiled with their respective soils; LMKT lapping compound, Honing oil, and slide gel lubricant. About 0.5 grams of each soil was spread on the bottom third of each coupon with a swab. The dirty weights of the coupons were then recorded. The coupons were then subjected to 15 minutes of heated ultrasonics at 140 F in their respective cleaners. Once cleaned, the coupons were left the air dry over night. The next day, the final weights of the coupons were recorded.