Using Plastofast emulsion.one coat per side.24 hour dry in the dark.using vac. table,arc light 2 feet away for 45 sec. same as always.spray with hose at night. no light.entire process done in dark.image falls out but starts to streak/foam?/and pieces just "flap" away when water hits it.the only thing i have done different from past is diff screen cleaner.easystrip.could this be a problem? I clean and degrease everytime.never had a problem in 6 years.