I would also suggest that anyone with a dedicated rosin press should go through this process on a small scale at least once - It may take some time however if you are analytical about it and make some conclusions its worth it.
If you find that you have no extractable trichomes left in your chip bags you might also find high volume of waxes and fats that liquefy at around the same temperatures are likely contaminating and reducing the concentration of your concentrate.
Happy Squishing!!