Hand picking and squishing works. Also look under the leaves for eggs and use some duct tape to remove them. If you are able to hand pollinate, you can use some floating row cover or tulle to cover them and secure with something to keep the pests out.

Duct tape is brilliant! I was struggling so much the other day trying to get them off! I'll try that, I've never hand pollinated before, so I may hold off on that. Will soapy water or anything like that keep them away?

Agree. Hand picking and egg patrol is moderately effective. Insect barrier row covers and hand pollination is the most effective control. Easy to do when container growing.

Squash bugs are fairly tolerant of most pesticides so using them usually kills more beneficials than anything.

Dave