I thought you were my Mum when I started reading but I'm younger than your DD.
My Mum comes round once a week, I don't ask her to but she starts cleaning my house, tackling my garden, etc.
Sometimes my house isn't quite as clean and tidy as I'd like it to be but I do my best to keep it as clean and tidy as I can baring in mind I have a baby to care for.
My DP and I are both, most of the time, with the level of cleanliness that we manage to maintain but my Mum walks in and shakes her head, like she can't believe it and gets straight to work. It really annoys my DP, so it's good she comes usually when he's at work. He thinks she interfering. She says it's just because she cares.
Her standards are far higher than mine and her home is immaculate.
When I was pregnant, I really appreciated the help with the cleaning once a week and I don't begrudge her continuing to do it now if she wants to do it (which she does and she is continuing to do it) but she's never going to be happy with the way the house is when she comes every week simply because her standards are higher.
What was fantastic was how she transformed my garden. I never do anything in my garden and my DP occasionally gives the grass a mow but that's it. Over the summer my Mum sorted out all the weeds, the over grown bushes, swept everywhere, mowed the lawn, etc and it looks amazing now.
I wouldn't say anything to your DD. It's her home. If your happy to keep cleaning and sorting her garden then that's up to you but you can't tell your DD that her house is dirty.
I'm happy for my Mum to come and clean if she wants to but I don't appreciate it when she starts making comments about the state we live it in, especially as in my eyes it's completely dramatic. It's not as clean as her home but it's not a shit tip by an stretch of the imagination.