@Stephanie881 No, this is not normal. You said you mentioned the situation to the host and she has done nothing about it. You also say the host is "so nice". Collecting money for bookings and expecting 5 people to share a bathroom and kitchen that the host never cleans isn't "so nice" in my book.
I read and responded to your other topic post yesterday about the conditions there. As I mentioned, several of the reviews mention how clean the place is, and that could be because those reviews were probably written by guests who were there when the people sharing the place were actually clean.
I wonder how strongly you have spoken to this host about the conditions? Speak to her again, and tell her in no uncertain terms that the situation is awful- that if she's not willing to clean on a regular basis, that you'll have to look for another place and apply for a refund. That she locks the cleaning supplies up indicates that she doesn't expect guests to clean. She can't have it both ways.
It doesn't make you a bad guest to ask for some refund in this case, but if you just continue to stay under the present conditions and expect a refund, that is bad guest behavior. If you bought a dress that the seams all started to rip out on the first time you wore it, you'd be justified in taking it back and demanding a refund. If you just kept wearing the dress as is for weeks and then took it back 2 months after purchase, chances are the store would tell you they wouldn't take it back.