Hi Garrett,
Your keys may not be responding due to some dirt or debris that is more serious than a little bit of dust. Compressed air usually works for dust, but something more malicious may be hiding under your keycaps. This could range from small bits of food or dried liquids or dirt. The best way to resolve this problem would be to gently pry off individual keycaps and use a gentle cleaning solution and a cloth to wipe away the grime.
If this doesn't resolve your problem, there may be a problem with the top casing of the laptop as the keys and the top casing are connected. This would require physically disassembling your laptop and doing a more thorough clean or replacing the top casing. You can find new casing on websites that are specifically for laptop replacement parts.
Hope this answered your question.