Why the INdesit washing machine WG1130D stops before the last spin?

HI there

Im renting a flat and the landlord is reluctant to change the washing machine, a front one.

The clothes drip a bit and out of three programmes it stops before the last spin and I have to turn the programmer one number forward but even so clothes drip. Any idea what´s wrong?? The filter?

Where´s the filter in this model? Behind?