Before a colonoscopy, you gotta make sure your colon is super clean. That means following a special diet and popping some laxatives to clear out any gunk in there. Forget about solid foods for a bit, stick to stuff like plain water, tea, coffee (no milk or cream), broth, and maybe some fizzy drinks in moderation. Your doctor might tell you to take those laxatives the night before or the night and morning of the procedure. Oh, and don’t forget to check in about any meds you’re on, 'cause you might need to adjust or stop 'em for a bit.