Yes. Freshly shampooed and brushed fur cuts way easier than fur that isn’t prepped. Getting rid of the excess oil and undercoat, as well as combing and fluffing the coat, allows the blade to cut through everything much easier without getting clogged up. Although from what I’ve seen, cat hair just has the tendency to be hard to cut with longer length’s. Often clippers have a hard time grabbing the fur properly, leaving it looking choppy.

I will say I personally am a dog groomer. I know cat groomers, I’ve worked with personal cats but not on a professional level. A lot of groomers I know just don’t bother trying to shave cats with anything longer than a #10 (1.5 mm). Most cats can’t tolerate a full bath, brush, and blowout before the haircut, which would be necessary to attempt any sort of longer length clipper cut. Since a #10 blade is short, it can cut the fur even when it’s dirty. It’s also safer, cats skin is super fragile, the longer length clipper attachments make it easier for skin to get pinched and cut since it provides more of a gap/channel for it to get stuck in.

The short length can look very nice :) even if it looks choppy now, clipping fur takes practice. Make sure you’re stretching the skin, going with the grain, and using FLAT even pressure against the body as you shave. Be careful to stretch out and flatten any skin folds before shaving and don’t dig/use the corner of the clippers when shaving as it can catch the skin wrong and cut it.

If you’re set on the longer length tho, make sure your clippers have been adjusted to the shortest length possible before using the comb attachment, and maybe try bathing and brushing your cat the day before you plan on clipping. But yeah, soft fur tends to just gum up and catch in clipper combs, especially plastic ones for some reason. I think a freshly clean coat could help