1)If the tying hand machine of the blade is not able to cut the belt , pls use a long flat nose plier to pull out the used blade ,and change a new one .

2)when the hand tying machine of stitching needle is blocked , you can use nipper or small screw driver to get it out . (if 1 section break into 2 section,we also can use one by one section avoid be blocked).

3)Add lubricant oil to every joint after tying hand machine are long time using.