Caching plugin showing random logins / basket amounts

Hi everyone,

I work for a company that has upgraded websites about 6 months ago, after the website was handed over to us we’ve had no support from the design team so we’re trying to piece things together ourselves!

I added W3 Cache plug-in to increase site speed since it was taking ~10 seconds to load any page on the website. It improved speed quite a lot, but there is one problem… At the top of the site we have a login/show user account name and basket amount which isn’t responding properly once the pages are cached.

My question is this – is there a way around this? Or is there a better caching plugin I can add that would maybe let me ignore the header of the site so that it displays the correct information on each page for a customer?

Don’t know if I should add the website or not, i’m new to all of this, but I can obviously let you guys know the website if it will help.

Thanks ??