I bought a set of Neewer filter adapter rings in order to use my B&W circular polarizer with my 82.mm and 77mm. Worked well but now I cannot get the adapter off the filter. I only finger tightened it snug enough that it would not turn when adjusting the filter. I have tried putting it in a plastic bag and leaving it in hot water, also put in the freezer for a while. Neither effort was successful in helping to unjamb it. Anyone have any ideas?