I have always broken in my gloves with oil and practice. I decided to hurry this one along by using the suggested oven tip I have heard about in the past. “Oh, just put your glove in the oven!” I never believed them, because I feared it would catch fire. I thought I was wrong. My Easter was ruined today.
Edit: Here is the link that says 15 minutes at 350F: https://ecosports.com/blogs/vegan-athletes/how-to-break-in-a-baseball-glove
When I used to play I’d just put a new glove under my mattress for a night or two and it was good enough. Sucks you were misled about the material it was made from.