Iron-on t-shirt relieve, anyone? I messed up my t-shirt using the iron-transfer sheets for light-colored...

I messed up my t-shirt using the iron-transfer sheets for light-colored shirts instead of dark-colored like my shirt is! I hold the correct sheets now, and I want to know if nearby is anyway to take the dated one off (it is already ironed on). If anyone have any suggestions that are greatly appreciated! 10 points to best...and there probably won't be abundant answers, so better chances!
Can I affix loft floorboards (for storage) even...
Answers:    I'm afraid they are designed to stay on. I'm sorry, I know thats not what you are looking for.
I've made a few Iron on shirts contained by my time & they last a long time, through lots washes... bleach, raucous detergents...

Maybe call the manfuacturer of the iron on sheets & see if they hold any advice... or a website.