I bought this cordless trimmer about a month ago and was happy with it. However, I didn't realize the string head dispense the internal string from tapping down when operating. I tried to dispense the string manually by pushing and twisting the red and grey part of the string head. And by accident, I rotated the grey part enough to suck all the string into the string head instead (opposite of what I want to do).
I have consulted the user manual and YouTube videos, none shows me how to replace the string for the current trimmer, or show me how to open up the string head to replace the string manually. Please advise.