I have had to deal with scale on calamondin oranges in the past. You are right, Erica, it is strangely satisfying! This is my third season with this Meyer lemon. I put it out on the deck as soon as it warms up in the spring and bring it back into this cozy spot in the kitchen in late fall.
I have a Mexican lime in a container too. I have the same spider mite problems with Mr. Lime. I haven't had any success with fruit production though. It is more cold sensitive than the lemon and all of the foliage died on it when I forgot to bring both of them inside on the night of Easter Monday. I thought it had totally bit the dust but it has come back and actually has some blossoms just getting ready to pop open. The thorns on the lime are deadly but the lemon only has a few minor thorns.
Right now I'm trying to decide just what to do with my lemon harvest. I've already picked 2 but there are another 17 lemons left on the plant. Mom looks tired and weary from all the effort of producing so many lemons.
I'm thinking limoncello for these babies! That way we can enjoy them over a longer period of time vs. a lemon meringue pie, which would be delicious but gone way too soon.