There are many videos on how to clean a yoyo bearing. This often involves showing how to remove the side shields and immersing the bearing in a solvent of some sort, most often mineral spirits. Do some Google research on “cleaning a yoyo bearing” and you’ll get some good ones. There’s actually many good ones.
As far as removing silicone from a bearing, I gotta ask why would you need to do that? And I ask that because you should never have done something to put you into a position where you need to remove silicone from a bearing. One you got the shields out, you’ll need to use a tooth pick or a needle. Be patient, be thorough. Use some compressed air to blow it out as well. And if you’re going through all that effort to remove silicone by removing the shields, you better just go ahead and clean the bearing out as well.
My suggestion? My local Dollar Tree has these 4 little glass bowls for a dollar. Buy mineral spirits at Home Depot for like $9 for a quart(should last a LONG time), toothpicks, A needle or long pin for de-shielding, compressed air, and 2 paper towels. Follow the videos, have fun.
Seriously, watch the video. It takes care of a lot of the questions. It’s not some high quality production, but it’s thorough. It’s also been embedded here many times before.