Why is my tumble dryer taking 2hours to dry clothes? ive only have it for about18 months and its in upright condition??

ive only have it for about18 months and its in upright condition??
Answers:    The heater may not be working. Also, you should verbs the lint trap with every use.
enjoy you been cleaning the lint trap. if you agree to it get to clogged up consequently that will make drying time longer.