The really minging ones go to be cleaned and reproofed (and repaired as necessary). I think their annual maintenance makes them last longer. The places that does them does a great job and none of them have ever leaked when they have come back.
It's not that minging but I do like to get them cleaned and put away - I'm was more thinking of saving a few pennies by just getting them washed instead of re-proofed too - credit crunch and all that
I washed ponies turnout rugs at the weekend both are only 4 months old and i did not re-proof, neither have leaked even in heavy rain and they are different makes.
I will be re-proofing next wash though.
I am luck as they will fit in mums old washer and i have some stuff that you just add to the water.
Works out much cheeper.......
Teresa the penny pincher....