This is a question with answer options. Goal: How do you clean a litter box?

Which of the following methods is more reasonable for accomplishing this goal?

Pick from:
i. Empty all of the litter out of the box and fill the box with 1/2 inch of vinegar. Let the vinegar sit for 15 minutes. Mix some warm water into the vinegar and scrub the box, and then dump out the mixture.;
ii. Empty all of the litter out of the box and fill the box with 1/2 inch of vinegar. Let the vinegar sit for 15 minutes. Mix some warm water into the vinegar and wipe the box, and then dump out the mixture.;...I think the answer is
i.