Through my experience, the films automatically come out after drying. Sometimes I fill the petridish with water, then through some space, the water goes below and lifts the film, which can be taken out easily.

Thank you @Vivek Chandel. SRC films do come of smoothly after drying. But when the film is prepared with SRC and hydrophilic plasticizers it does not come off smoothly all the time. This is the problem I am dealing with at the moment.