1 The pads must be secured to the sides of the hole or the mice will eventually pull them out. 2  Large holes will need to be repaired. 3  After a couple of days, look for evidence of continuing mouse activity. 4  If there is any, check the holes that you sealed, and look for more holes.
A better measure for a pen's ink economy- and this is what they use in product testing- is writing distance. A dry ink ballpoint pen typically writes in the kilometer range- it can draw a continuous line of about 1-3km. For example, Papermate has a economy disposable pen line called Kilometrico. Bic pens fall into this category. A roller ball pen has a typical writing distance about 5-10 times less than that. Typically, 400-700m. A fountain pen has even poorer ink economy. My best guess is in the 100m-200m range, based on how often I refill my fountain pen vs replacing a roller ball.
As you write, tiny amounts of this metal are deposited onto the page. The silvery markings may resemble pencil, but they are permanent and smudge-proof. Because it doesn't require sharpening or refills, the Inkless Metal Pen is an amazing gift for artists or doodlers. Its ink is solid, so it will never leak, and it can be used upside down or under extreme conditions.