Kodak HIE problems (Light leaks?)

Recently I developed a roll of Kodak's HIE Infrared film. It was the second time I've used it since I started studying photography three years ago. I did everything I was supposed to do, loading it and unloading it in the dark.....and it was fogged. Totally. I'm confused because I made sure my darkroom was sealed off and light tight. ...unless I missed a light leak somewhere. Here's the question: is HIE more sensitive to fogging by light? Why I ask is because I do have some light leaks here and there, but they have never messed up my regular b&w films, and they aren't very pronounced. Also, I heard once that plastic tanks will fog infrared film (the radiation goes through them I think). I did use my plastic tank and reel.

Any insight you have for me will be most appreciated. Maybe there's something I'm missing besides the obvious.

Thanks Erin

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