Hey Mocha Family,
Did you know that I've been making these slick ballet buns for years? I especially loved how this one stayed picture perfect for the entire day. It's all in the technique and not rushing the process. Take your time detangling or the hair won't be as flat on the head. I actually reach for a tool like my Tangle Teezer for this. Finger detangling is not enough. Moisturize for a good shine, but be sure to use products that mix well with the gel you're using. I use lots and lots of gel. I am literally gluing the strands in place with gel. Brush it all in with a natural boars bristles brush. A paddle brush is just not the same. Don't forget to gel the bun itself! Nothing worse than laid hair with a fuzzy bun. Finally, tie everything down with a silky scarf. Be sure to apply pressure to every strand you hope to set. Do NOT remove the scarf until the hair is as dry as possible. It's OK if the hair is damp in the middle, but the front and sides which tend to fuzz up easily and get sweaty will need to be dry so that the ends don't result. In a time crunch I have used a bonnet/hooded dryer on low heat to speed things up.
All that said, there are a number of approaches to try. Please check out my Slick Ballet Bun playlist on YouTube for some more ideas.