This may only apply to unmarried, SD's here, as I assume married guys are fundamentally paranoid about sanitizing their environment after BCD.  
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But for the rest, I was just getting my place cleaned up for my afternoon rotation, and I noticed there's a used sponge and it's wrapper in my bathroom wastebasket.  My cleaning service only comes once every two weeks. So this bit of "inconvenient truth" is till sitting there.   It was a simple thing to move the artifacts to my trash cans outside, but it made me think about those more subtle little things that might give a clue to those more suspicious SB's who may be looking...  
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For example, as I look around my bathroom with a refocused eye, I notice the following, easily correctable conditions:  
1. The stack of "guest bath towels" on the top shelf of my towel rack has only one towel - it usually has three.  
2. The plastic toothbrush holder with the pink toothbrush in it is laying next to an almost depleted mini-tube of Colgate.  This is a problem because today's SB uses the tube with the blue toothbrush and left an almost full tube last time she was here.  
3. Local restaurant food containers delivered by DoorDash in my kitchen trash cans represent way too much food for just me.  It's clearly enough for three large items (salad and two entrees) and there are no leftovers in my fridge.  
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Now I make a point of never demanding exclusivity from an SB, while I imply that I intend to remain exclusive without ever actually promising to be exclusive. Still, my experience is that no SB wants to be thought of as sloppy seconds, or thirds.  
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So now:  
1. Bath towel restored
2. Appropriate toothbrush and full tube laid out as expected
3. Kitchen trash can emptied
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And now I'm all set for a 6-10 hour romp.  
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But what level of diligence do you exercise when an SB is due to visit?  
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Life is good
The Cat

If you have more than one woman coming to an environment, they will sense each other.

I have several gals visit me at my home where I now live alone, and they all know I see other gals, so it's no biggy if a towel or the toothpaste looks different each time.

But if such a situation makes you uncomfortable, then see the gals at a hotel.

Women have the ability to detect things a spectrograph would miss.

if he were married! LOL

I "almost" always make sure there are no empty condom wrappers still on the bed or any used condoms on the nightstand. lol

 
Aside from that, I don't do anything more except to try to make sure there are clean sheets on the bed, by "clean" I mean no fresh cum stains from a previous date, especially if my last date soaked the bed. lol

 
Once upon a time when I truly was "high volume" and by high volume I mean four or five different women a day back in the good old days of the Del Rey when I was younger (50ish) and could do that much fucking. Back then I would try to do much the same as agency girls do and discard all the condom wrappers and dirty towels from my previous dates of the day somewhere where they would not be noticed by the subsequent dates of the day. I did this partly because a lot of the girls would roll their eyes and just know that I was going to take a LONG time to cum if they knew they were my fourth or fifth date of the day.  A lot of them would like in the trash can to see if there was a pile of empty condom wrappers.  

 
I don't advertise it to my SB's that I am seeing several other girls at the same time, most of them think that seeing them once or twice a week is all the sex a guy my age needs, so what they don't know or ask about won't hurt either of us. Like you, I don't lie, but I don't go volunteering information like this either.

To be clear for those who think I'm "worried" about being caught, I am not.  If an SB straight up asked me if I'm seeing someone else, I would say yes.  Lying is generally a bad idea, IME.  So my precautions are more about ensuring she has no reason to ask, rather than trying to "prove" she's the only woman I'm fucking.  
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However, while I do not lie, there are methods to deflect a conversation I don't want to have.  If she makes a comment like, "I'll bet your having fun with someone when I'm not here," I can deflect that by reminding her I've never been an expert at juggling multiple partners, and it's not something I want to do.  This is not a lie; I am certainly not an expert and I really do not want to do so. That fact that I do juggle multiple women does NOT mean I am an expert or that I WANT to do it.  It would be much easier to order up a SB date like I can get a lap dance at a strip club.  So, I deflect and move on...
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The technique is rather simple, really: If our discussion happens to wander into areas that may involve another SB, I always speak of any experiences or issues in the past tense.  Note that I define "past" any way I want.  If I was balls deep in my Asian Unicorn's ass yesterday and today's SB asks me if I've ever had anal, I say something like "well, there was a girl I was seeing a while back who wanted to try it..."  She does not need to know that "a while back" = 15 hours ago.  :p
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Life is good
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The Cat

SB, Are you seeing anyone else?

 
Me,  Yes, but only 6 or 8 other girls, and most likely no one else but you today.

 
SB, Very funny.  

 

Or there is the dreaded question about your "number"

 

SB, How many other girls have you been with?

 
Me, I don't know, maybe three or four thousand, I don't really keep count.

 
SB, Very funny, if you aren't going to take this seriously then never mind.

END OF MESSAGE

because I really enjoy hearing sugar dating stories from the girls' point of view and I love talking about our experiences with others we are dating or have been dating.  They all know I'm a slut and I like it that way.  Yes I do tidy up a bit between dates, empty the trash, etc.  but as many of you know, my favorite venue for sugar dating is  my good old RV.  Just yesterday I was balls deep in a new SBs ass in the RV.  She loved everything about it, said the RV seemed like so much fun and was a great place to get busy.  She asked me straight out if I used it mostly for sugaring and I said yup, that's right.  So she knew there had been lots of other women in bed with me before her and that knowledge turned her on. A lot!  We're already planning our next RV encounter.