It is advisable not tie tangles in the visible part of the tissue.
If wool or thread ends even if we do not we finish the line, we must unravel until the beginning of the last row.
Cut the thread and start the new row with a new ball (remember that the ball should be the same batch).
This will be neat and free of knots in sight because although unite and hide it well, to wash the tissue or simply because you use it, these knots are noticed.
A tip that will make our crochet fashion garment to look perfect!