Best way to get rid of squash bugs?

Hand-pick them and drop them in soapy water - early morning they're slow. Check under leaves for bronze egg clusters and scrape those off, that's the bit that actually gets ahead of them. Put a board down near the plants overnight; they hide under it and you can squash them in the morning. Row covers on young plants until they flower (then take them off so bees can pollinate). Clear the plant debris in autumn so they don't overwinter.