--UPDATE--
Well, I've tried UV light, multiple cleanings, some super odorous Hoppe's No. 9, volcanic rocks (not sure if they're even legit), and coffee beans as suggested by @WojtekWeaponry here on the forum. I have the cologne-infused soft case on the outside picnic table (that the gun was in for PPT), but I still smell the cologne despite sunlight/UV bombardment. I should just toss it out. This cologne is like a plague...and it gets on ME and then it gets on anything I touch. I'd be horrified if my car took on that scent.
So far, the coffee beans have worked the best! They've mostly neutralized the sickly-sweet and cloying cologne. The only hitch is my brain still thinks I smell it, but I don't think I do. I will keep testing so I can give my nose and brain a break, as my brain will 'replay' this scent, torturing me a bit like a bad song that won't stop playing in your head. The girlfriend confirmed the neutralized cologne.
Now I need to know the SCIENCE behind it! Thanks everyone, and thanks Nathan at Wojtek!