Cooling Off after ride

I use a good fan in conjunction with AC to cool down.

I think you already answered your own question. It's about core temp and not surface temp. AC and fans aren't that effective when you're overheating from inside.

The hot shower to cool down and hot shower for a sunburn are myths. A COLD (not cool) shower will bring your core temp down, just like jumping in a pool. A comfortably cool shower will do next to nothing, because comfortably "cool" water is within a few degrees of body temp. You need <75F water to really cool you off in a short period of time and 75F water out of a shower is not pleasant. (pool owner with lots of water temp experience talking)

Iced drinks, as you pointed out, are another good way to lower core temp. You just need to find the balance between getting cooled down and giving yourself a stomach ache. A large glass of ice water cools me off within minutes.

Chug a slurpee or Icee - the trick is not to let the cold sit on your upper palate. If you can drink enough quickly, you can feel yourself cooling off from the inside.

Most of the time I just take a cold shower of use a garden hose and then linger around a bit (lift weights, core exercises, etc.) before changing into my good clothes. Doing the last mile or two at a easy pace helps too.

Cooling your head is top priority.

Cold shower. Don't worry about a blood pressure spike.

Cold water on the back of the neck, under the armpits, in the groin. Any place large volumes of blood are near the surface.

Cold drinks are useful if after the shower you find you are still too hot.