Wet vs Dry Trim/Popcorns for Hash

Hi I'm planning to make bubble hash and I don't know whether to use wet or dry trim. I hear that when dry is used you get more contaminants but wet you get a lower yield. Is this right? Thanks.

Dry all the way. It is possible to run wet and frozen but the trichome heads fall off much easier after drying. Much better yield. Use the full 8 bag set to filter out the trash.