[cestria]

I've seen a couple of ways of doing this,

Wrap the floss around the string, then tie an overhand knot. Repeat the wrap and knot tying until you get the size you need. Tie a double overhand knot to finish. Trim the ends, even singe off with a cigarette lighter. Dab a little drop of Fastset on the nock point and very quickly rub in. Keep your fingers moving in case of permanent attachment.

I’ve read that you should whip the floss on in a similar method of starting and ending a serving. Trim and glue as above.

I maybe wrong but it works for me