<r>Thanks for answers, but I found the solution.<br/>
It's might be specific for my type of wrap that I didn't saw anywhere else but the way that I wrap them was the problem. <br/>
After closing them I need to pull up this part of metal from both sides for a second, one side of wrap rise up and when ...

<t>Hey, I'm having problem with mugs for a long time. Have a lot of wasted mug because don't know actually what makes my printings blurred, and sometimes not crisp. Problem is that is quite random, some mugs are fine, and few is more or less blurred. So mostly from 1 to 5 mugs are not right.<br ...