Can I suggest you give it one more try before you sell.
I had some "trial and error" before I decided I liked them.
The first time was too sticky, the next time it became one lump.
Now, my method is:
Mix up hot water (circa 300ml) & chocolate shake until ready to drink. Then, put ONE teaspoon of husks in. Then give a 5 second whizz with the handheld mixer. Just enough to mix the husk power with no lumps.
Don't go on for ages because this is when the trouble starts.
Pour the jug contents into a porrige bowl. EAT straight away!
It will get more textured as it cools and absorbs itself.
yummy.
(Have only tried chocolate flavour!)