I went out to lock the shed this evening for the day, and on the way to the shed, I saw what looked like rat droppings on the lid of the green wheelie bin. But I was wondering, how could rat climbe onto the tall wheelie bin? Because I saw on Youtube videos, that rats falling into the buckets made to be traps for them, and once they fell, they couldn't climbe back up, but just die in there the plastic bucket filled with water. They try to climbe up, but there is nothing to hold onto to climbe. So, how could have rats climbed onto the top of the plastic wheelie bin, and placed droppings on the top of the closed lid of the wheelie bin? Any ideas?