should you rent to someone who has one bad review?

[Noorhayati0]

I received a rental request from a guest that has a total of 7 reviews with one review that says the guest left the house dirty.  Their other reviews short with no complaints but given as a host it can be risky to leave a bad guest review not sure if I  should be reassured by them. Any advice on renting to a guest with one red flag review would be greatly appreciated.  Also, they've already asked for a late check out as well.  Thank you!

[Zheng49]

Bad review as in...what? 4 stars? 3 stars?

For me, if they have 6 good reviews, and 1 bad review, I'd be okay with that unless that bad review is the most recent one.