The ATWINC15x0-MR210xB modules are assembled with an EMI Shield to ensure compliance with EMI emission and immunity rules. The EMI shield is made of a tin-plated steel (SPTE) and is not hermetically sealed. Solutions like IPA and similar solvents can be used to clean the ATWINC15x0-MR210xB module. However, cleaning solutions that contain acid must never be used on the module.