How to finish off this crop.. before its too late!!

So I my minor bug and mold problems are starting to get worse.. I have a few weeks at most but the plants are pretty far along into development (7 weeks I believe) and they are small plants so they should finish sooner rather than later I think.

Can anyone give me advice on how to speed up the plants death process while maintaining most (if not all) of their quality?

Some pople shorten the light cyle beyond 12/12. go to like 10 hours a day.

Other then that it is late in the cycle. CO2 would not even speed it up enough to make a difference.