I have a brush. It's never used on skids, though.
Toilets get flushed until clean. A little bleach poured in after poo.
Every night I pour a little more bleach around the rim of the flushed downstairs toilet and leave it sit for twenty-thirty minutes while I do before-bed stuff. Then I do a quick scrub with the brush and flush while the brush is in the water.
The handle gets wedged under the seat to drip dry overnight, put in the pot dry the next morning.
I do the opposite with the upstairs toilets in the morning.
I'm disabled so upstairs/downstairs only get used either in the day or the night so plenty of time for the brushes to dry.
Although my toilets have always looked sparkling clean after the flushing and I don't live in a hard water area, I like to give a scrub just to make sure I don't get a build-up of mineral deposits or staining from our water supply (we've had what I'm told were red-staining iron leaks in the supply a few times). This staining doesn't get noticed until it dries onto the porcelain and is a bugger to get off later.
Bleach is terrible in septic tanks but when used carefully in small amounts in a mains system is better than other cleaners. It breaks down into salt and water and, importantly for me, doesn't kick off my asthma like toilet cleaners do.
I don't believe my brush is as germy as many people believe their brushes are. Especially if they dive straight into shit. It's bleached, dried and replaced in its pot. I don't use it to wash my back or scrub tea stains from my mugs!