Im having a terrible time diagnosing slow server response time on our collection pages (3-5 seconds or more). I'm not sure if the pages are just not staying cached for long, and if so, what could be causing this - or if it's something else altogether. It seems that on repeat visits collections load super fast, but once I revisit the site 30mins later or more the pages are all slow again.
Our website is https://www.houseandhold.com
Heres a recent GT Metrics report illustrating the problem https://gtmetrix.com/reports/www.houseandhold.com/S4ToonKY
Any insight or help would be hugely appreciated!