Microwave interior accumulates excessive condensation or water droplets during and after cooking.

User-level steps:

• Ensure that the ventilation openings on the sides, rear, and top are not blocked.
• After cooking high-moisture foods, open the door for a few minutes to allow steam to escape.
• Wipe down condensation from the interior after use to prevent rust.

If condensation is extreme and vents are clear, the cooling/exhaust fan may not be operating correctly and should be checked by a technician.