I have a casual boyfriend who I see about once a month. We don't live near each other so it's when I'm touring near him basically. When I lived closer we usually met once a week.
We have a lot of fun in bed but weirdly, he has never given me a clitoral orgasm. However - I do get vaginal orgasms with him, which is very very rare for me otherwise. I don't think I've ever had one with a client, although I regularly orgasm if they go down on me.
If I was going home to a partner every night I don't think I'd want sex every day.
Re: spunk - he always cums over my tits or bum unless I specifically request otherwise (usually so I can do a creampie photo for my private gallery.)
I would have thought if you have a shower and use a vaginal douche (just with water) that should get rid of most of it. Obviously your clients will be wearing a condom so there wouldn't be any issue of contact with penis. Maybe disallow fingering after a session with your BF? Or if you have a pre-booking, tell him you want him to cum in your mouth? Or - put a beppy sponge in before sex with the BF and remove it before the client arrives, that will catch everything.