Rod Oven pops GFI breaker

[Furu]

If it is an exposed wire element (like in a dryer)there might have been dust on it but more likely it was a cal-rod element (like in a stove element) that had absorbed a bit of moisture during storage. Once it had a chance to run and dry out for a few days things became OK.
While not a fan of GFI's, they do have a purpose. If you remove one and down the road someone gets hurt you can kiss your butt goodbye....

Well it is working fine now. The odd thing was it did not trip the GFI for about an hour after it was plugged in, then it would trip it. It would make more sense to me if it tripped it immediately.