1. Check the sharpening toolsIs the blade or the sharpener sharp? A blunt blade can easily cause saw...
READ MORE1. Check the sharpening toolsIs the blade or the sharpener sharp? A blunt blade can easily cause saw...
READ MOREBlack and blue: the most common colors, suitable for daily writing and office work.Red: often used f...
READ MOREOil-based whiteboard marker: Use a paper towel to soak up wet ink to prevent spreading. Apply alcoho...
READ MOREPossible causes and solutions: Dry tip: The ink solidifies and blocks the pen ball after long-term u...
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