Jeep Liberty Oil Fill Cap

I Have A 2005 Jeep Liberty With The Sohc V6 3.7 Liter With 80,000 Miles. A Couple Of Months Ago When I Checked The Oil I Found Mayonnaise On...

I Cant Seem To Figure Out How To Take The Cap Off So I Can Add Oil. My Owners Manual Tell Me What It Look Like And Where Its Located But It...

Checked The Oil And The Cap Had A Little Discolor On It Little Cream Color Just A Little Not Much