how can I get rid of the rust in AirPods Pro charging pins?

Hey Mehdi123_21,

We understand you need help cleaning your AirPods Pro case. The following steps will help with doing so:

Clean the case of your AirPods or AirPods Pro

Clean the charging case with a soft, dry, lint-free cloth. If necessary, you can slightly dampen the cloth with isopropyl alcohol. Allow the charging case to dry. Make sure not to get any liquid in the charging ports. Here are a few more guidelines:

• Remove any debris from the Lightning connector with a clean, dry, soft-bristled brush.

• Don't use abrasive materials to clean the charging case.

• To avoid damaging the metal contacts, don't put anything in the charging ports.

All this is outlined further here: How to clean your AirPods, AirPods Pro, AirPods Max, and EarPods - Apple Support

We hope this helps out.

Take care!