A fountain pen usually skips when the ink flow cannot keep up with the pen strokes. Many fountain pen enthusiasts call this phenomenon skipping, and several factors can cause a fountain pen to skip.
For instance, if the ink runs out, you will notice that the pen starts to skip and miss out on important strokes or details. Another reason could be damaged or misaligned nibs that cause the fountain pen to skip because the ink will not be able to flow smoothly from the cartridge or barrel.
Similarly, if foreign particles and dust block the internal components of the pen, it can prevent the ink from flowing freely. But this problem can be tackled if you flush the nib with clean water as we mentioned earlier. Some professionals also recommend using thinner ink because it doesn’t clot or dry up easily.