This pen seems to simply not work; my pen is brand-new and it constantly skips and when I write the lines come out as a very faded and thin grey most of the time. I'd say about 95% of the time I'm getting almost invisible grey lines and then the other 5% I'm getting the thick black lines that the pen was probably meant to have. I've tried so many angles and tricks to get this pen to work, but it's still not writing correctly.
It's quite strange because there are many good reviews on this item. I probably got a dud, but I wouldn't recommend this item in case this is how the pen really is.
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