A number of things can cause overly warm/hot drip tips. Not trying to be poopy here but it's almost never the drip tip's fault. Could be too much or too little airflow, too much or too little power, too high of heat flux, bad coil symmetry or underwicking.
Take a pic of your build (newly wicked) and shoot us some build specs, desired
vaping wattage and airflow settings so we can help you get a more stable
vape and cool that driptip down.
Not sayn that a delrin dt won't feel cooler, it will, but with a correct setup the metal dt won't get uncomfortably warm even at 100w plus.
It's all about maximizing the amount of vapor per watt applied that keeps things cooler.