Vyne cases are made to wear well. A little care keeps the finish clean and the magnets strong for the life of your phone.
There are a few ways, depending on how dirty it is. Take the case off your phone first and start with the gentlest one.
For the interior lining, use a dry or barely damp cloth. Let the case air-dry completely before putting it back on.
The Pearl finish is treated to resist yellowing, but oils and dye transfer (from denim or leather, for example) can still mark any light surface. Wipe it down regularly and it'll stay clean and true.
The magnet array needs no maintenance. Just keep the back of the case and your charger free of dust and grit for the cleanest snap.