Stinky Npcs

I have recently got back into playing Sims 3. Having a lot of fun and game runs well. Of course there are things that were never fixed. The new issue I am having is Npcs not showering. Both at university and in the home world. My controlled Sims can use the shower just fine though it's way to fast. Which is another bug. But for whatever reason Npcs won't shower inside. I've tried replacing the shower and making sure it's routable. I even had a roommate catch fire and they put themselves out in the shower. So it makes them not using it even more strange. I end up putting the outdoor shower outside for them or having to cheat their needs. But I'd like them to shower like normal. I do play with mods and I'm on pc. If anyone know how to fix this that be great. If you need more information let me know. Thanks.