So, I just returned from vacation & one of my Black Prince plants w/ approx 15 tomatoes on it is suffering. Most of its tomatoes have become wrinkly or pruny. It was pretty hot while we were gone (mid to high 90s) and it's on drip. I've done searches for wrinkly tomatoes & haven't found anything helpful. Are they dehydrated & need more water during the heat? Any other suggestions? The plant looks healthy & pest free - just most of the tomatoes are wrinkly as though low on fluids. Thanks!