Using this software https://digitalvision.world/products/phoenix/
Not doing every single frame in the film, just making it less distracting. So mainly heads/tails and anything that might pop up in between. It’s auto clean but then go through manually to make sure something didn’t get removed that it shouldn’t touch. Then lots of manual cleaning because auto only sees so much, depending on what level you have it set to. It takes many tedious hours to do this, frame by frame.