Potty training for good

I’m looking for advice on training my Maltese Shih Tzu mix with pottying. I got him at 4mo and he’s 10 mo now. While he’s come a long way, he still has about 1-2 accidents a week. Typically in the same spot, since we moved to a new house 1.5 months ago. I know the new house could’ve affected his progress too, but I find the tail end of potty training frustrating. He will do so well for days then a puddle with no warning. I am working on bell training now, but any advice for how to get him to that fully housebroken stage would be great!