I always go for earlier appointments.  
Sometimes there's a nice bed cover, and we're rolling around on it with no towel laid on top. We get lube and jizz and sweat all over. And during the exit clean up, I see her make the bed, but not change the cover or sheets.

but I never recall seeing any evidence that someone was there ahead of me.

I've heard rumors of last appointment being a plus for some, as a "regular" would often bring food & wine and have dinner with the provider at her incall and enjoy some off the clock GFE time?  Even, heard of last appointment making a Starbucks run?

does she even have energy

They only consume 2 meals per day and I would imagine they "have" to eat dinner.....either alone....or with company...so why not?

I'll first have to say you need to start seeing a higher quality provider if they aren't cleaning up a mess.

I agree with you. If you took in a black light, you might see the evidence of prior visitors. Also, If they have rimming on the menu, are you sucking on a dirty door knob?

a real cheap-ass.

of the day with my regulars for this very reason.  I have often gone out afterward for something to eat with the girl I saw, and sometimes her and her roommate.  Sometimes they even split the check and I eat for free.  New girls that I haven't reviewed yet will always be first or second appointment of the day so they have the opportunity to show me their best so I can give them the best possible review.  Many low reviews are from guys that saw a girl late that was tired.  These reviewers are often just being honest, not malicious so they have to call it like they experienced it, but should always say in the review that it was a late appointment so the rest of us can take that into consideration.  

You ARE trying to get me to hang up the jimmy!

very infrequently last, and most often in the middle of the day, and I do not ever recall (with one exception) any lady or her place of business appearing to be less than clean and fresh. It's just good business.

There is this well reviewed Thai girl. While the service was excellent, the shower bath mat was wet, the apartment messy and the bedding looked tired. I didn't repeat.

whether during the day or evening, their places and beds have always looked nice and clean.