Terrafibre 5 X 5 Mats

I have been growing micro greens for years. I have worked with many different varieties of seeds and soils. Successfully growing in soil for years I have begun teaching classes in my community. Per requests from class participants I ordered these mats as a less messy alternative to soil. I did a lot of research before ordering them and have been using the method suggested both by the insert that came with the mats and the materials that Harris seeds provided after I called multiple times to get help. I have experienced mold mold and more mold. Despite trying everything. The company refuses to refund my money and one customer service representative went so far as to say I was using them incorrectly and they are not meant for growing micro greens. I am beyond disappointed. I have lost money and have thrown out many trays of moldy seeds. I even offered to send the remaining box back to Harris seeds at my cost if they would give me a refund. They refused since I had used a portion of the package. I have lost confidence in this company and will certainly not order from them again and have removed them from the recommended list I give to class participants. I feel strongly that something is wrong with this box of mats. It is not always the customers failure.