Should I hire a cleaning service for my friend?

We have a friend from high school with a great studio apartment in the city. She is very welcoming and lets everyone stay with her rather than pay for a very expensive hotel room when they visit. But now her small place is getting really cluttered. The last time I visited, she said people are always leaving their stuff behind and she doesn’t want to just throw it away. A lot of it looks like junk and it’s minimizing the little space she has. I thought of hiring a hoarding service http://www.majikservices.com/hoarding-cleaning.html in her neighborhood but don’t want her to feel insulted. Maybe I should ask her first. Everyone stays at her place but never really offers money or help. Is there a good way to make this offer to her without hurting her feelings? I would offer to do it myself but it’s gotten so out of hand, I would not know where to start.