Welcome! Very happy for you and your wife.
Question for you are you using the ego-T tank system? the one with the plastic mouthpiece
tanks as one piece and the little metal tube with a spike as the atomizer?
I started with something similar. They can be soaked in hot water. I found vodka worked better. I didn't have much luck long term with that system the atomizers clog up and burn REALLY easily if you are using sweeter or dark colored juices.
Something to think about going forward is a clearomizer I like my CE5s and my Kanger protank. Both of which will go on your batteries just fine. Alot of people like the Vision vivi novas but I have not used them. I am sure others can chime in with other suggestions.
A FYI the Kanger is a bigger up front 15-20 bucks up front but the atomizer heads are only 1-2 bucks each. The ego atomizers are 5+ bucks each.