nmtonimarie

I just did my first practice FMQ piece - very exciting! I am using the little genie bobbin washers and there is one thing I do not get.

When I look at the bobbin washer, one side is slightly curved, the other side is flatter. So which side goes against the bobbin case? I understand they go under the bobbin but I just thought if the sides are different is there a reason for that? I have a Janome and the bobbins also have a slight curve so am I matching the washer curve to my bobbin or what? Or does is there no difference, don't worry about it, just drop it in and sew? I'll try flipping the washer over and seeing if there's any difference but I just thought someone here might have a quick answer.

Thanks!