• Beatrice
• 09 Jun, 2026
• • Cast Iron Skillet
  • Rainbow Seasoning
  • Cast Iron Care
  • Seasoning Issues
  • Kitchen Gear

Should You Scrub Away Rainbow Colors From Your Cast Iron Pan?

You just finished cooking a beautiful steak in your cast iron skillet. As you wipe it down, you notice something strange: a shimmering rainbow sheen across the cooking surface. Your first instinct might be panic. Did you ruin your pan? Is that oil burning? Should you scrub it off immediately? Take a breath. That rainbow is actually a sign your pan is working as intended. But let’s break down exactly what’s happening, whether it’s a problem, and when you might want to take action.