We are very sorry for the problems with our filament, but this cannot happen mechanically, it is not possible to pull and twist the string during continuous winding of the string. Even if the coil is not arranged, it is not possible. The string is wound continuously, without further "connection". At the beginning of the spool, the string is inserted into the locking hole inside the spool, wound by machine, and at the end of the winding (after reaching a specific length) the winding is stopped, the string is cut and locked into the locking hole outside the spool face. The coils are then removed from the production line and immediately evacuated. The only place where it is possible to pull the string is during manual handling when the end-user accidentally pulls the string.