Hi Stephanie! It looks like you had great momentum starting out. Most campaigns do see things start to quiet down in the middle, and it's hard to push through that. At this point, you can try reaching to people you initially emailed and send a gentle reminder that the campaign is "all or nothing", so not reaching your goal means you won't get any funds. Many times, people need constant reminders because they forget, or procrastinate on donating.
You can try asking them if they have feedback or questions that you can address on the page or in a lab note -- starting a conversation with people about what you're working on is a good way to get them engaged, and they often respond more readily to that than just asking for donations. Encourage them to share for you on their own social media, if they can't donate.
It looks like you have a team of collaborators, is it possible for them to also help you spread the word to their networks, if they haven't already?
Looking at your metrics dashboard, your conversion rate for page views is at around 3%, which is just around the average on Experiment. At this rate, to hit the goal, the main thing to focus on is getting more page views.
It's great that you've been posting such interesting lab notes! Be sure to share that content on your social media to help show some extra dimensions of your research. You can also post them to other forums such as reddit or hobbyist sites, or try to mention other related Twitter accounts when you post them there, to encourage them to share further.
I'm curious about the community that initially backed the original Hookpods campaign. I feel like they would be interested to learn about and support research that involves how successful the devices can be! Do you know the creators of the Hookpod? Perhaps it would be worthwhile to reach out to them and ask if they can post about your research to their community.
Most importantly, don't give up! Keep trying new things. You can do an AMA ("ask me anything") on reddit, for example, or try to get in a local paper or radio to talk about your work. These tactics work best when you've passed 50% or so of your goal, though. Remember that most of your supporters are often people you know. To engage these people, highlight what's cool or unique about the science that you're doing. If people are learning new things and getting excited about it, they're more likely to share!