Caig Labs CW100P Circuit Writer Pen, Silver-Based, Silver

I had the pen for about 6 weeks before I opened the package and tried it but unfortunately it had already dried up. I dismantled the cap and spring and cleared the debris but looking inside the ink well there was a solid blob of once usable material. I missed the return window. I'm not able to provide a worthwhile review because I never got to use it. I wish it had a longer shelf life.

I thought the first reviewer just didn't shake the pen enough and get the mixer moving inside that mixes the material to get it flowing. I did get it moving but the material still would not come out the tip. It seems somewhere in the tip end it was clogged and dry although the very tip could be depressed just nothing would come out when squeezing the barrel as instructed. I chose this listing as it was 1 day shipping for me but in hindsight the other listing for the product seems to be of fresher stock as most report that it worked for them. Since the mixer did move I believe the contents were usable just the pen itself was not. I recommend you get the the same product from the other listing or deal with getting a refund on this one after you learn that the reviews are correct.

These things have a short shelf life. After that, they go bad (dry out).

Don’t buy this I got two pens and both came dried out.

This thing dries easily up and the ink is not even conductive.I had better luck with just using a simple graphite pencil.This is useless c**p!