Use a bowl of water with lemon juice or vinegar and microwave it for a few minutes to loosen grime with steam. Then wipe down the interior with a damp cloth. Avoid harsh chemicals or abrasives.
Use a bowl of water with lemon juice or vinegar and microwave it for a few minutes to loosen grime with steam. Then wipe down the interior with a damp cloth. Avoid harsh chemicals or abrasives.