I close my Venetian blinds before I go to bed and have woken in the morning to find these knots in them? I first thought they could be caused by wind and
Adanac Blinds & Window Treatments: How to go from tangled to NOT - Retrofitting your Horizontal Blinds
Eliminate Blind Cords & Increase the Safety in Your Home
How to Restring a Horizontal Blind with Looping Lift Cords – Fix My Blinds
Untangled this menace in my blinds : r/mildlyinteresting
Federal Register :: Safety Standard for Operating Cords on Custom Window Coverings