The utility of these things is great. Simple to use, bright, and erasable - what
more could you ask for as a college student with rented books?
I bought a multi-pack of these from a local office supply store and
unfortunately after only about 2 weeks of use they're all drying up! I will use
one and after about 100 pages of various highlighting tasks, it will no longer
be visible because it has dried up. Start using a new one, and another 100 pages
in, it too has become too light to see.
I thought perhaps extended use in my hand had faded the ink due to heat, so I
popped it in the freezer overnight then let it thaw out. No go, still unable to
use it because it leaves so little ink on the page. These have simply been
stored on their sides on my work table, not in a jar with the ink away from the
Suffice to say, this is a disappointment.
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