Use toilet paper to remove most of the mess first
Wet a few squares of toilet paper or use a damp wipe
Wipe from front to back
Repeat with clean paper or wipes until the area is clean
Use a bidet or handheld sprayer if available
Wash with mild soap and warm water in the shower if needed
Rinse thoroughly
Pat dry with a clean towel or toilet paper
Wash your hands with soap and water afterward