Here is what I do...
My beans are soaked in vodka 'cause I like to make my own extract.
Lay bean on clean wax paper. I split my beans in half length wise with a knife. spread out and then with the back of the knife, run it along trying to scrape the seeds out. They stick to the wax paper and I spatula them off into my batter.
Seems like the seeds like to stick to the wax paper and it's should be easier.
What do you do?
I don't even use vanilla beans any more since I found vanilla bean paste. It is a really thick paste that has vanilla beans and extract in it. It is really strong and only a little is needed. I love the stuff and makes my life easier so I don't have to deal with vanilla beans.
I cut the edge off with scissors...then run a butter knife down the pod, collecting/scraping the seeds...then scrape the butter knife off on the beater in my mixer wherever the batter is and then all the seeds just get mixed in.