my Beats headphone ear pads thats are cracking?

if they are under warranty return them

if the pads are cracking you can clean them with distilled water and a lint free cloth, be careful not to expose the speakers to water.

the inherent issues is stretching the material, sweat and weather can shorten the life of the material. Aside from that Beats headphones despite their status and association have been cited in many credible reviews as not particularly good audio hardware or parts.