Ddlg dirty diapers

So my partner and I are larger women(sweat more plus we live in the south), and we have a ddlg type relationship. My little wears diapers sometimes and sometimes they’ll wear a diaper,dirty diaper and then go to sleep in dirty diaper. And will also go two or three days without a shower....in my opinion that’s very unhygienic. How can I get them to understand that that’s kinda icky lol? Advice please? (We also don’t live together yet)