Gucci,
I hear you! LOL! It has been a challenge with Mei Mei.........I have had her since she was 3 months old and she is now 5 months old.
She understands to go potty outside and that is good to do, but does not understand that going potty inside is bad.
It just take a lot of hard work and patience..........I have a 1 year old Pomeranian that still is not 100% potty trained, and we also have a 7 month old Shih Tzu. So, we are dealing with quite a bit right now!
If she is your only dog or puppy, it shouldn't take as long, so keep at it!! She will eventually catch on!
My big problem with Mei Mei is barking.........she yaps at the drop of a pin. Also at night multiple times, which gets very frusterating.