Avoiding leaving evidence that you snuck out can be tricky, but there are some tips you can try. First, make sure to clean up any mess or traces you left behind, such as footprints, fingerprints, or discarded items. Second, avoid using any devices or accessories that could leave a trail, such as a cell phone or a GPS. Third, choose a discreet and safe location to sneak out from, such as a window or a backdoor. Fourth, avoid wearing any distinct or memorable clothing or accessories, such as a hat or a necklace. Finally, make sure to return to your house before anyone wakes up or notices your absence.