Hello, I decided to cross-stich some cherries into my jeans. I finally managed to finish and I have been trying to remove the backing. I tried gently pulling outbthe strings (I saw someone do it on Instagram and she made it look very easy) It is not easy ????????. The strings keep snapping and I'm not sure what to do. Is there anything I can do to fix it or is it unsalvageable?

I'd really appreciate any tips! Thank you