Yes I do.... Im a bit OCD.
Every time I change a coil on some of my heavier used atties, I clean, polish up, take apart as much as I can and clean everywhere I can. A clean atty is a great atty !!!
As far as my mechs and even my regulated mods, another big YES.
I clean them every time I take one out that I havent used for a while. Even in a case with silica bags etc, metals oxidize, even the supposedly gold, rhodium, sterling plated ones oxidize. Brass bits get polished at least once a month on mods and atties, sometimes more. Theres nothing uglier than a brass positive pin especially on any Origen atty.
SOme manufacturers use better brass than others. I have to say that GP and GUS brass bits are some of the best ones. Some of the worst brass were on Super T devices, even thier SS got more oxidized than any other gear ( at least the ELAs, never had the pleasure of their original line )
I could go on and on. Part of the reason I love mechs vs reg is the fact that I can break them down and clean and blow out dust etc. I worry about the insides of my box mech. I have more access to my old Provari. I can at least clean the contacts and blow out the insides.
I had a buddy that had a bunch of high end mechs. He was always buying new ones and Id seem many of them lined up on a desk. Id ask about them and he'd say they no longer worked good.
I took a look at them and geez, they were SO DIRTY, juice in the wells, in the tubes. THe switchs were so gunked with food, grease, you name it. I cleaned a few of them and damn was he impressed.
I told him how could you be so OCD with your motorcycle bits and bobs and not think of cleaning your vape gear.