i go to supercuts 1-2 times a year for a trim, but in between i dust my ends when straightened and on dry hair.
Straight because its easier on my natural hair and i dont want to accidentally cut too much, and also I can see my damage, my progress and see my work clearer.
If i do it wet, i cant really always see the splits or damage since the water or saturation of product will smooth it over and i will either miss areas or i will over estimate what needs to be cut. I deep condition before i trim and make sure I have a bit of leave-in and oil so that the manipulation wont be disastrous to my hair, and it also helps glid through the hair better too (manipulating all the way dry hair would kill my hair).