MRS. CLEAN wrote:
When clothes aren't drying, it's either the element or the spinning.

But, this is a new dryer.

Could it be the vent is clogged after 30 years? It vents into the
attic.

How do I clean it out?

Clean _what_ out? With whatever you have that works best. Like,
find any buildup, knock it loose (think flue-cleaning brush on
extension
wand), suck it up with shop-vac or such.

OTOH, cleaning out attic of 30-yrs-worth of lint and rot may be a
bulldozer job. Literally.

Lotsa luck,
J