Sometime during the summer I noticed our 2-yr old key-lime tree had some weird looking things going on with its leaves. Awhile back I sprayed with a combo pesticide and fungicide spray and nothing has really changed. I do keep it well watered and use Osmocote sporadically through the year. Any ideas what this is? It almost looks like a shiny, slimy coating. I haven't seen many aphids at all either this year. I can get more pictures if I need to...thanks!