Thank you!! I made some this morning to replace my previous attempt with bits in! Think my partner wondered what on earth I was doing with a pan of seeds and slime before he went to work this morning!!!
I did both of your suggestions, didn't let it get too thick and threw into the strainer some just plopped straight through but then it stopped coming, so I grabbed an old pair of tights (I'm strange in that I just have them hanging around in a kitchen drawer! Great for soapnuts/oat baths!) and shoved the seeds in there. It was great! I did get lots more - most of it kept sticking to my hands so I had to keep peeling it off - but all in all a success!
Still didn't get a lot though I will definitely buy more seeds and make a much bigger batch next time.