Linn LP12 Black Felt Mat How do you keep it on ?

I've owned a Linn LP-12 for more years than I can remember, but the one thing I can remeber is that the felt mat comes off with each and every album. I've always believed(and maybe mistakenly so) that if another mat worked better, they would have been using it after all these years. It's kind of a quirky thing, but you don't fool too much with a classic--it's the way it is!! It seems as though a $5K front end ought to have more than a .25 mat, but who am I to judge.