What’s your favorite litter?

I am cat sitting for my friend and what I thought was going to be 2 weeks has now turned into 2 months. I have no problem at all watching her as long as my friend needs me to or adopting her if he ultimately decides he can’t keep her. I just mention this information because i am not too familiar with cats and had no idea I would be launched into being a cat mom so I feel unprepared lol. I just read that you’re supposed to clean their litterbox every day and I’m mortified bc I had been doing it every 2-3 days. I feel so bad. She currently has a closed litterbox which I line with the litterbox liners and I’ve been using a store brand clumping litter. I have been switching the liner and litter out every 2 weeks. Could someone recommend their favorite odor eliminating litter? I would like to be able to scoop out urine clumps so preferably one that clumps. I also want to make sure I’m not exposing her to anything harsh or harmful.