Madza3 2008 can't remove headlight wiring harness

Hi, I have a 2008 Madza3 and I'm trying to replace a low-beam bulb (passenger side). However, I can't get the wiring clip off of the bulb prongs. I've tried pulling hard and wiggling it all directions for 10+ minutes and it won't come off.

Is there some kind of lubricant I can use to get this plastic harness off?
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I know this a very old thread but if i help a random thread browsing folk im happy

Make sure car is off

Grab some wd40 and spray some between female and male opening of connector. Wait for lubricant to penetrate and just wiggle back and forth they will come apart like buter

I used this on all tractor trailer rigs electrical 120 pin connectors and DEF harness.

Picture for fun