Thank you for your feedback. We have not had this problem in the past. However cracking does take place in polycarbonate lenses when exposed to alcohol-based cleaners—this is a common issue with plastics. To prevent this, we recommend using only soap and water or Windex.
If you’d like to discuss further, please reach out to us directly. We're here to help!
We can send you further instructions for how to care for your eyewear or can be found in our documentation online.