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.
I didn’t know anything about this, but was curious and looked it up. Most methods say to turn off the oven before you put it in, some say a lower temp. I found one result that said 350 for 15 minutes, but it said to watch it closely the whole time. I don’t think your glove would have burned if you were watching it, things just don’t burn so fast that you can’t catch them before they turn black if you are watching it the entire time. I don’t know if warming up a glove helps it, but it does seem like you didn’t follow the instructions properly, and after cross referencing should have done the oven off method.