This Could be a piece of debris or even just some lint that’s gotten caught in there. Take a look inside the gun and see if you can spot anything that might be causing this issue. Finally, it’s possible that your Scotch tape gun is just defective. Door de transparante https://vuf.minagricultura.gov.co/Lists/Informacin%20Servicios%20Web/DispForm.aspx?ID=9996723