My washer-dryer is Zanussi TURBODRY 1000 cannot dryer?

My washer-dryer is Zanussi TURBODRY 1000. It can dry only 30-40 minutes even though I set time for dryer 100 minutes. Indeed, it can work and the green light (signal for dryer)show and everything seem working but the water mix with my clothes when the time for dryer function working around 40 minutes. However,I saw in early time of dryer process, It can work until 40 minutes later the water is mixed. Could you please answer my queation.