When do I change Dice ?

We all have that guy at the club who is really lucky, he seems to pull a 6 out of the bag just when they are needed and it never matters whether its a low or high score that's required, those scores just keep on coming.

I must have had the same dice now for 10 years, to be honest never really gave them a second thought sometimes I win, sometimes I lose, was it bad generalship or bad dice?

But recently the old favourites seems to be under performing.

By chance I met up with a friend of mine over the weekend who also plays plenty of Golf (how does he find the time whilst painting 000's of 15mm Napoleonic's ???) and we got talking about changing clubs to improve his game, golf is not really my thing but it did lead to an interesting conversation about changing dice, he has thought about this in far more detail than I ever thought possible, he has tried the lot, dropping them in a different way, from a closed fist, rolling them from an open palm, a lucky cup, dropping them on to the table, a dice tray.
Fresh dice, Pearl Dice, Ivory Dice, Gem Dice yet he still seems to get more 1's than 6's.

Now I don't want to over egg this issue but I have sensed a creeping feeling of impending doom every time the dice are rolled recently..... :-)
OK more a nagging doubt..... :-)

When I look at the old dice I remember those low ammo rolls, that Charge that never went in and the Warlord falling over just as he was about to land that fatal blow.

So I made a rash decision, I would buy new dice!

Time will tell if these new dice are any better than the old ones, still 6 sides, still the same size, ok a different cover.

Was it the dice or was it the fact that I needed a shot of confidence in my dice rolling.

As Napoleon said.
  
"I base my calculations on the expectation that luck will be against me"

I wish I could say the same, we all need a little bit of luck don't we?