Used to have endless problems with Diawa and Okuma reels but since changing to a Stradic 5000 about 4 or 5 years ago, no problems. To me they were caused by twist more than anything .

 What sort of silicon spray did you use? Any particular brand or type? 

 A large portion of wind knots come a lack of maintenance of the line roller. The line will eventually torque up and when not under tension will twist into big knots which mostly happens during a cast. Another one that is often overlooked is that the stripper guide or set of guides is either too small for spool diameter or the incorrect distance from the reel. It's impossible to have all these off the shelf rods that have the guides which cover all spool sizes. 
I am interested to see how the silicon spray goes, I remember a while back varivas or someone did a line conditioner but it wasn't overly popular 

 It's just a auto silicone spray. The improvement is night and day! I've tried alot of different remedys.  I've always bought top quality gear used all the good leader knots, but same result. So a simple spray and it's all good . Give it a crack. It works good on mono too.

yanks are all over it, originally to take the stiffness out of flouro. Im going to give it a shot to help with casting distance on fluffy braid( and hopefully prevent the fluffiness). Food grade is the go apprently.  vaguely remember hearing about it on here and it popped up in a search.

 Wind knots in my view are all about casting and retrieval technique. You need to have tension on the braid over the whole retrieval. This starts at the cast. You need to close the bail arm manually so as to anticipate touchdown and keep the braid tight. Then on the retrieve there needs to be tension on the whole retrieve till the lure is removed from the water.  Winding the first and last 10m on the reel on retrieve under no tension is a recipe for disaster. I get zero wind knots ever and when I lend people my rods who dont fish much they get wind knots  all the time so I put it down to technique.