I have a question on end stitching, sometimes I think they are secure and there are no ends sticking out and then when I color and wash my end will be poking out a little. I have been doing the end hack mainly. Sometimes they are good and sometimes I feel like I need to add a couple more stitched after I wash? I don’t know why. Should I make sure the stitches are completely vertical or at a slight angel when I am finishing? Please help! Any tricks? Thanks so much!!