The removal process is like leaving a sponge to absorb liquid. With the colour layers there is more sponge to get more liquid and the polish softens up and falls off. The two layers, base and top are the least absorbent so they will be a bit of work but just be gentle, don't try to chisel the stuff off. Just go back and soak again.
I assume you are only removing one foil at a time before moving on to the next nail.
Um......:sweat:.......no......:sad: