Burping Baby

I'm a FTM and sometimes, well a lot of the time it is really hard to get my baby girl to burp. We burp her on our shoulders, hold her leaning kind of forward sometimes, and we pat and rub her back because the lady at the hospital did that and it worked but it doesn't seem to work as good now. My step mom showed me how to do this thing where you kind of rub in a pinching motion (obviously not actually pinching here) up her spine because she said that helps with loosing the air in there but sometimes that doesn't work either.

Is there any "techniques" that are different that could work for getting her to burp?