I will say that my 1991 KA dryer required setting to the extreme Very Dry position of the auto cycle for jeans and towels to get fully dry in one cycle, but they *did* dry. Two passes through were needed if set on the "normal" dry position. A *full* load may have taken an hour, but *never* two hours. Small to medium loads were correspondingly shorter times. Lighter-weight loads such as sheets and casuals did fine on the "normal" position.
How long is your vent ducting and what route does it take from the dryer to the end? If it's 20 or 30 feet long or more, has one or more 90° turns, makes a vertical run, goes through your attic, etc., it may either be excessively long or there may still be some obstruction that got missed during the cleaning.
My vent was literally a straight shot through an exterior wall. The wall opening was offset from the dryer outlet so I had to use a section of flex-vent to make the connection. This is not the KA dryer, it's my Fisher & Paykel dryer in the same location, with the same piece of flex-vent.

How long is your vent ducting and what route does it take from the dryer to the end? If it's 20 or 30 feet long or more, has one or more 90° turns, makes a vertical run, goes through your attic, etc., it may either be excessively long or there may still be some obstruction that got missed during the cleaning.
My vent was literally a straight shot through an exterior wall. The wall opening was offset from the dryer outlet so I had to use a section of flex-vent to make the connection. This is not the KA dryer, it's my Fisher & Paykel dryer in the same location, with the same piece of flex-vent.
