I WONDER - Why Do Rhinos Love Mud?

The video explains how rhinos deal with unwanted parasites like ticks. Unlike humans, who can use their hands to remove bugs, rhinos have big flat toes that make it difficult for them to do so. Instead, rhinos use mud wallowing as a natural method to get rid of ticks. The thick mud forms a layer over their skin, which dries and cracks over time, causing the ticks to fall off. This clever method is an effective way for rhinos to manage parasites.

What happens to the mud that rhinos use to get rid of ticks over time?

What is the clever aspect of how rhinos deal with parasites?