I raised 2 boys and this is how I helped solve some of that problem. From the time they could use the toilet, if they… ‘missed’, they had to come in and clean it up. Did they do a great job? Not usually. But I’d have them do it over if they didn’t get everything cleaned up off the bowl and floor. It made them much more conscientious about how they went. There is nothing that teaches better imo then the offender to have to experience the crime for themselves. They are perfectly capable of aim but have to be motivated for it and started from day one. Oh…. and this works for husbands who weren’t taught better as well!

Hi Mark! A telescoping brush will help you reach those tricky areas in small spaces.
As soap for killing germs, it depends on the type of soap you use. Antimicrobial soaps kill microorganisms. Household soaps will lift the germs off so you can rinse/ wipe them away.
Here’s a video on cleaning cleaning tools you can check out for how to keep your cleaning toothbrushes gunk-free: https://cleanmyspace.com/how-to-clean-your-cleaning-tools/