CLR is a cleaning product most popular as a spray. Yellow bottle. It’s really effective, and significantly safer than most harsh cleaning products.

Wet & Forget can be great for a lot of tile or glass showers, but it does seem overpriced.

You can also get little cleaning pods that hang into the toilet bowl to prevent build-up from happening.

Avoid the tablets that go in the toilet tank. They can do real damage to your plumbing and it’s not worth it.

Last advice is only helpful if you own your home, but upgrade your exhaust fan. The humidity can cause dust and such to buildup faster.