You're welcome! I didn't know about the bell until Loki was a little older and trained, but he would still have accidents by the door because we didn't know he needed to go out. He didn't do anything wrong, it was us
He picked up the bell in like 2 days and once he realized "cool, i ring this, i get to go out, i get a cookie" he was good to go
Sammy took a little longer to figure out the bell, even with Loki's help, but she got it. I feel like a butler some days but that's OK because I can let them be wherever they want in the house. I used to have to keep them in the same room as me because they would be napping and then wake up and need to go out and I would have no idea. Now they sleep wherever and when they wake up and want to go out, they ring the bell. It's awesome!
The bell is just awesome because it teaches them they need to ASK to go out and that we will respond. That seems to be the part of the training they don't get right away. My two are to the point where they come and yell at me (!!) if I don't come right away.
So they definitely get it!