Why does the V-groove of the fusion splicer need to be cleaned frequently?

The fusion splicer is a precision instrument. Once there are dust, oil stains, and water stains in the two thin slits where the optical fiber is placed (the blue area in the red frame in the picture), the optical fiber displayed after magnifying it hundreds of times on the screen is already obvious Misalignment, which leads to the failure of the fiber to advance, and it cannot be felt once or twice. Once it is too dirty and the misalignment is serious at a certain moment and cannot be welded, the machine needs to be disassembled to correct the alignment bracket. It seems accidental, but in fact it is a little misalignment, which affects your work progress. So you must develop a good habit of cleaning the V-groove every day!