Hi I use catsan, have you thought about a hooded tray? Is lil one actually weeing in the tray, sometimes when they get a lil bigger they may over shoot the tray, & a lil piddle may miss & hit your flooring.
Be carefull about spraying fabreeze/air fresheners, some cat's start to pee everywhere to mark their territory.
My friend's cat started peeing on her bed as she had changed her washing powder/conditioner, when I explained this, she changed back & all was well again. So just a lil advice there
I'm quite lucky as I have a friend who has a factory & she gives me plastic sheet's (I am a cleaning freek & Baloo was my first inside cat, so I was a bit freaked out incase the litter tray smelled), so I lay a sheet in the tray, two sheet's of news paper & then the litter, yes I know OTT but it works for me.
Baloo sometimes wee's almost on the roof of the hood, so just as well it is hooded So when he goes, all is collected in the plastic sheet knotted & binned. I am lucky to work close to home so I can keep popping in.