I wear a head liner, skull cap, head sweat, whatever you want to call them. I often carry a spare, so I can change it, 1/2 way thru my ride

as with the other day, after my hot sweaty ride, I sprayed the inside of my summer helmet with some leftover sanitizer then rinsed it w/ my water bottle. shook off the excess & left it in the back of my car, concave side up. when I use it again, it will be just fine

when I bike commute, I use a 2nd pair of bike shorts for the ride home. I have more than 1 helmet & if the helmet thing bothered me, I would certainly keep a 2nd at the office. regardless, not cleaning the inside of my helmet is not an option. I have hyperhidrosis, so I wash everything, after every ride, right away, every time

I have carried a small towel, tho several sheets of paper towel, is more common in my bike trunk, to dry my face & head of sweat, at the 1/2 way turnaround. I also carry a mesh cap in case I want to go into a public establishment

since this time of year, we sweat so much, rinsing yours with water, then blotting it, will be sufficient? if you start with it a little damp, so what?, it will just be damp from clean rinse water, & you'll be sweating again anyway