i think different tubs and water pressure can make the difference on good bubbling as well as the base itself. i have used BC's for years and haven't had it thin out unless i go over the recommended amount of fo. the bubbles last longer than any of us stay in the tub. but i do have a deep tub so the distance from the faucet is further, and gives more force to create good bubbles...but i've never had a customer complain...i don't think they really think about the thickness as much as we do...just like wet spots,lol Bugtussle, i pour some base into a large ziploc, add fo and dye, close securely and "smush" until it's well blended, then snip the bottom corner and pour into bottles.