While it sounds like you're taking good care of your brush, you might be doing something that encourages the wild bristle behavior and if that is the case, you may find your next brush behaves the same way. On the other hand, you might just have a poor brush and your replacement could turn out much better. Just in case it might help, I'll just add a little advice:
When cleaning up, I sneeze out the excess lather, then with the bristles pointed down, give it a good soaking from the running water. I squeeze it frequently until there isn't any more soap coming out Then I hold it with the bristles up under the running water while keeping the bristles held closely enough so they can't splay. I squeeze the brush several times while doing this. Then, squeeze it out again, and then give it a few shakes trying to leave the bristles as close as they want to be. I store mine upright, not hanging down.
If you're considering a synthetic, I'd encourage you to read this great thread from
GDCarrington:
http://theshaveden.com/forums/threads/the-four-generations-of-synthetic-fibers-clarifications.37568/
I wanted a synthetic for traveling, and after reading the thread, ended up buying a Frank Shaving Pur-tech Synthetic. I've been pretty pleased with it, but it doesn't hold water very well, so I tend to end up with either a too thick dryer lather, or a wet drippy lather. I can make do with either, but I prefer my Badger. It's a Vulfix (the Super Badger Shaving Brush - 660) bought on Amazon.
Best of luck on your next brush!
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