Dogs with drop ears in particular can be prone to getting itchy due to moisture build-up that can lead to minor infections, think like athlete's foot and not like a massive life-threatening infection.
You can mitigate it by doing stuff like regularly plucking the hairs from the inside of their ears, ensuring that their ears are fully dried whenever they get wet and stuff like that but even then it can still be a recurrent problem and you can get ear cleaning drops for pets that are usually just salicylic acid solution and some other ingredients that helps clean out the ear. Note that this is just for maintenance and not for treating an actual problematic or serious infection.
Dogs ears also have these external bumpy bits that are probably cartilaginous that have crevices between them that can accumulate gunk so you can clean these bits with a q-tip but you have to be very careful that your dog doesn't quickly jump up or shake its head. Tbh just use a cloth or tissues or something because it's really not worth the risk.
Also please for the love of dogs, do not use human cosmetic products on dogs.
Human cosmetic products are safe for human skin contact but that doesn't mean they are safe for dogs. In particular there are quite a few essential oils that you may find in human cosmetic products that are absolutely not safe for dogs and can be quite toxic to them. It's just not worth the risk.
Those are human baby q-tips lol. I have a dog with floppy ears and I'll give her ears a gentle wipe with a regular cotton ball and some specific dog ear cleaner after she gets a bath.
I know they exist for ear infections, no idea what the purpose would be outside that though. Putting q-tips in their ears is probably safer than our ears? The problem in our ears is that it tends to just shove wax deeper and compact it and if you keep doing that it means you just block your ear with a bunch of wax. Dog ears are much wider so I figure it's less likely you run into that problem.
I mean I guess you run that risk in the same sense that you run the risk of cutting their paw pads when trimming fur or poking them in the eye with the funny lil brush
But with a dog this chill I seriously doubt it's likely