The problem isn't limited to harnesses either, my boards are sinking a lot more than they used to as well! 
What rubbish.
Global warming means the temperature of the water is higher, therefore less dense. This means my boards don't have as much relative flotation as they used to.
I'll stay in that river in Egypt thank you very much 
I have a similar problem with wetties. (I did actually believe that they shrunk as opposed to be becoming more 'muscular') I put my wettie through the washing machine prior to its first winter outing (coz I didn't rinse it out end of last winter), and it grew about 2 sizes! I have yet to try it on my old ones but will let you know if it works
Even my van's shrinking 'cause with the fickle wind lately I have to squeeze in my formula board as well in the hope i might score a sail.
