I have a new, 3month old 16x20 mighty press (bought new from Proworld). I initially went off the temperature on the press but the thermometer seems wrong. When I used my IR thermometer it showed the thermometer on the press being 50 degrees low. I show up at ~96 degrees on the IR therm, so should be relatively close!
I called mighty press, and they replaced the themometer free of charge. The new one appears the same. I only noticed this because I had a transfer come back that was peeling really bad after 1 wash, and after talking to someone at ProWorld they suggested to check the heat, as it may have been TOO hot. My IR therm confirmed this.
I now Have it set to ~340 on the press thermometer and ~390 on my IR themometer. I am getting hit-and-miss on my images and wasting transfers and customer tshirts out the wazzoo. So much for quality control!
Sometimes the transfers edges will "peel" up and curl a bit, when i pull the paper. It feels like it has not released all the way.
I pre-press the garment, at least once, but normally twice for ~10-15 seconds total time. They are 50/50 gildan tshirts. I have tried with/without a teflon sheet, and also with/without a pad (sweatshirt, and an actual press pad) underneath with similiar results. Temp is ~385-390 at 12 seconds.
I don't see what I'm doing wrong? It is costing me more to make a tshirt than not making one!

. A couple of shirts I was able to "save" by repressing (same heat) for another 12 seconds. I'm not for sure if these will stay together or fall apart quickly. I am pressing with FIRM pressure (not having to jump up and down, but it is PLENTY tight). I have made multiple tshirts in the past without an issue. The heat isn't fluctuating much (maybe 5-10 degrees max?) from all parts of the heat pad.
I'm trying to give a quality product, and seem to keep running into issues. I paid the extra to get a "quality" press and feel this is where my issue is. I can post/host pictures of the shirts if someone wants/needs to see as well.
I can't see what is the culprite!
