I have been growing three Nephs. for about a year now. Recently I became really busy with school and kinda ignored them for a while. I was just moving them to their new home under a fluroescent light and noticed that the leaves were all very shiny and very sticky to the touch. All three still seem to be doing well and are still putting out pitchers. I also have noticed some little spheres of what I can only describe as sap on some pitchers. I have examined all of them and can see no insects. What the heck is going on? Any ideas?