307 eating screen wash fuses WHY?

[JakesterUK]

I've a 51plate 307 2.0 HDi over the past fortnight on two occasions now the front and rear screenwashes have stopped working.

I've checked and they both run off of the same 10amp fuse, which when checked has blown, I've replaced the fuse, it lasts for a week and pops again.

The cars used daily and I do about 800miles a week in it, any suggestions what could be causing this or has anyone had the same fault??

[pikeyboy]

my mates did this the other week, he swappedthe fuse thinking his screen wash bottle had frozen and operating the motor had blown the fuse trying to pump the frozen screen wash.