I'm in California, by no means as much humidity but we have the HEAT!! So, have you ever soaked for only 30 minutes? It seems to work about the same as a 12 hour soak regarding sprouting. I don't have research that mentions shorter soak times providing more nutrition, but I love the fact that I don't forget the little dear in the corner!!!!Still figuring out my setup and what is going to work for me. The heat in humidity in my garage in central Florida are extreme at times, so I've had some initial mold problems. I'm using BOSS and the chicks really like it once it's good and sprouted. I'm starting them inside in large yogurt containers and only soaking for 12 hours instead of 24 (the shorter time prevents the water from souring and seeds from splitting open), then switching to another container with drainage holes where I can rinse them multiple times a day. Once they are ready to put out leaves, I'm going to move them outside to the garage to green up and will to try keeping the seeds in a single layer to allow for more air circulation once they are in the trays. I've also been picking out as much of the chaff and broken seeds as I can in about a minute and when I see it between switching containers.
Here are a couple things that I learned from my aquarium days about mold/algae growth that have been applicable to growing the fodder that may help you too:
1. Mold grows in the presence of excess nutrients that are not being used up by the plants
Such as: too much standing water, not enough air/water circulation, dead materials like unsprouted seeds and pieces of chaff, too much heat from sunlight or ambient room temperatures
2. In a balanced plant to nutrient ratio, the sprouts will be using up all of the nutrients available to them and will not leave extra for mold
3. Periodic cleanings of all surfaces with chemicals that don't leave a residue (bleach or vinegar for example) are necessary to keep mold from gaining a foothold in your setup. Dawn dish detergent and many soaps leave residues that can be harmful to living things.
This is by no means a comprehensive list and I'm not an expert, but maybe it will be helpful to you
Loved your mold hints by the way. I've only had a mold issue one time, when trying to sprout oats - don't bother with them. Every seed is fully complete with all the nutrients it requires to sprout until the 2nd leaf is formed. You are completely right about the non-sprouters creating havoc! I just finished my gardening class, so I remember that little detail. Thank you!