Hi, I've been using Smush Pro to optimise my images and it's made a big difference, however, the images still seem to be a problem on my site and are what is bringing down both my Google PageSpeed as well as my Performance Report on here. I've also been through the list of images that are listed in the Benchmarks section of the Performance Report and (I think) have made most of them as small as I can, but it is still showing a really low score for this. I am not sure what more I can do with them - they have been smushed, they aren't enormous images size wise (generally no bigger than 300x300px ish), I've saved them in a low-medium or low quality, but it's still saying I can reduce them further.
For example, one of the images listed says this:
Compressing and resizing http://www.essexmums.com/wp-content/uploads/sites/4/2017/01/Organix-Valentines-Day-Hearty-Breakfast.jpg could save 29.6KiB (88% reduction).
I've edited the file and it's the same size as it appears on the website, and has a quality of 5 when I save for web. Plus it's only 13kb in size so I don't know how I could possibly reduce it by 29.6kb! I feel like there must be something I'm missing here!