So last night I mixed up my first batch of channel grease, and from what I read on the internet, there were varying opinions on what the proportions should be between petroleum jelly, lanolin, and zinc oxide. Tried a mix of (by weight) 2 parts zinc oxide, 7 parts lanolin, and 3 parts petroleum jelly judged solely on desired SPF of next day's swim and consistency. Seems like the formula worked really well for a 6-hour swim in warmer water, but I had a heck of a time getting the stuff off. The only thing that seemed to work was dishwasher detergent. Will this mean that for my swim in late August (colder water) I need to bring dish soap or is there a better alternative? Maybe a different mix?