Some equitorial strains' trichs never appear "done".
You could try significantly lowering the lights off temp.
Depending on the room size, you may be able to do this by emptying a full tank of CO2 in the room a few nights in a row.. Just be careful not to expose yourself or others to the high CO2 levels to avoid health problems.
I agree with the light..cut it to 10 14 dark. I've never tried this but supposedly some fruits put of a hormone that will make thing ripen faster.. I think banana have it.. U could put some ripening fruit in the room with them during night time and slow the exhaust some..