By this point its probably no longer news that ThreadHeaven is no more, but as you work through your stash, have you wondered what to use as a replacement?
Thread Heaven
October 2020 – Quilts, Quips, and other Nearsighted Adventures
The Ultimate Guide to Thread Conditioner - Suzy Quilts
When should you pay for a pattern maker?
Vintage Sewing Box Blog - Vintage Sewing Box
Thread Magic Thread Conditioner Thread Strengthener Similar to Thread Heaven for Hand Embroidery, Cross Stitch, Beading, Sewing, Quilting
The Ultimate Guide to Thread Conditioner - Suzy Quilts
Bead Stringing With Needle and Thread, by Warren Feld
Taylor Seville Thread Magic - WAWAK Sewing Supplies
The Ultimate Guide to Thread Conditioner - Suzy Quilts
Vintage Sewing Box Blog - Vintage Sewing Box
Does anyone else use thread gloss? : r/Embroidery
Hand Embroidery Tips: Thread Taming & Organizing –