I've been using this IET for 15 years never had an issue.
I recently ran out of Mesika Elastics
so I bought a new spool. I've never seen an invisible thread that is so VISIBLE.
ITS NOT
LONGUER COATED IN MATTE BLACK!!! What the F*** is this!? To me it looks like cheap chinese ripoff.
I am waiting to get a refund. I cannot believe this.