I've used Kitten Revolution before, but I'm not sure if I was doing it correctly, since it looks like my rats have lice again. So I'm just here to confirm. Will I only squeeze one drop of medicine between their shoulders and then reapply a week later? How many times should I do this? Do I have to stop them from grooming? Should I bathe them before? Also, I may end up EXTRA deep cleaning my cage. Fleece gets washed in cold water with unscented detergent, I wipe all of their hides, platforms, and floors down. Should I clean the bars? Should I scrub their litterboxes too? I change litter frequently. Any advice is appreciated! I maybe got unlucky and got lice again or I made a mistake and didn't do it long enough.