Laws on Escrow accounts

[Barrett Starling]

I am currently renting in Montgomery County, MD and my lease is due to expire at the end of the month. I have been a tenant since 2009 and my landlord has held the same deposit for 3 different lease terms. As we have been discussing the return of my deposit (the townhouse only has normal wear and tear) my landlord has disclosed that my deposit is not in an escrow account. It has gain literally pennies in interest. I have attempted to communicate with my landlord that the money should have been growing by at least 3% per year but she doesn't seem to understand. She is elderly and hard to communicate with. I have sent the link to the state website showing proof of this but I don't seem to be getting anywhere. Any suggestions on how to handle this? Thanks!