I suspect that I might be about to admit to heresy here, in attaching something novel to a line, but this is something which occurred to me last time I fished, and which seemed to work well. I was fishing a team of three buzzers using droppers tied with three turn water knots. As usual, I was getting the odd tangle, particularly when the wind got up. I know this could be reduced by improving my casting technique, but it was still an irritation.
Looking at the tackle, it occurred to me that the main cause of the tangles was the tag ends on the water knots. I'd clipped them as close as I dared, but there will always be a little barb of nylon waiting to trap any errant leader, and once it is trapped the inertia of the flies will do the rest. It seemed to me that if I could protect the tag end, I could eliminate a lot of the tangles. So, I tied it up again, this time sliding a 5mm length of silicone tubing down over each knot.
It definitely reduced the tendency to tangle, and it didn't seem to put the fish off. I need to test it more, and I think it could be done even better with something which can be streamlined - a blob of some kind of rubber based cement instead, perhaps.
Am I to be burnt at the stake?