All my jumpers go bobbly. I wash them on wool wash, dry flat or hanging (depending on instructions). I bought one of those bobble tools last year, but it does seem to help. I've tried a razor too to shave the bobbles off.
Some are from Weird Fish (made partly from recycled stuff- is that it?), one is wool from M&S and another from Sainsburys. I want to be able to wear jumpers for more than a season before having to dump them.
Is it the material?