"Now if I can only get those dratted bugs to hold still for a second...."
Cynthia, I've posted this a time or two in other threads but is worth repeating IMO. Last year while watering just accidentally stumbled on to this. Squash bugs and their nymphs will normally scurry away and under foliage very quickly when disturbed. But when watering with a cool stream of water, I noticed that both adults and juveniles just walk very slowly. Not only that, but the adults which were in hiding will often slowly walk out into view. Right after watering, usually waiting a minute of two, I can usually collect the majority of squash bugs on my plants. I've not had an unmanageable infestation since noticing this easy way to catch and eliminate the critters last year.
While I don't like spraying water on the foliage of my tomato plants, I've noticed the same behavior with a similar leaf footed bug that hits my tomato plants each year. These bugs get to flight and fly much more readily than the squash leaf footed bugs, but being hit with cool water causes them to pause as well. I don't do this often for fear of the water spreading disease, but if the pests start to get out of hand, then it is time for a massive spray and squish party. That was very effective last year during late summer when these particular pests seem to be most active and are present in fairly large numbers.