Although the dutch ones remind me of when I used to be a contract archaeologist. We would invariably be somewhere remote so would have porta loos, often the ones with the counter weighted flap to cover the deep blue. Most of the time, the flap would end up with a multi layered skid mark that would not be removed until the dav lav truck turned up every other week. I devised a method to avoid the skids (or sometimes whole turds that would not flush). It was to pre wet the flap with one or two pumps of the flush, fold up a good few sheets of paper and lay them on the flap like a carpet, conduct your business and then flush safe in the knowledge that all your doings would slide nicely into the drink in one satisfying lump.
Although the dutch ones remind me of when I used to be a contract archaeologist. We would invariably be somewhere remote so would have porta loos, often the ones with the counter weighted flap to cover the deep blue. Most of the time, the flap would end up with a multi layered skid mark that would not be removed until the dav lav truck turned up every other week. I devised a method to avoid the skids (or sometimes whole turds that would not flush). It was to pre wet the flap with one or two pumps of the flush, fold up a good few sheets of paper and lay them on the flap like a carpet, conduct your business and then flush safe in the knowledge that all your doings would slide nicely into the drink in one satisfying lump.