Clearing users browsers cache

Hello All,

Can you please help me in the below

I have created two cmssites Localhost9002:/us Localhost9002:/ca But in the same browser I am. Not able to switch between the both site if I switch from us to Canada store I can see Localhost9002:/ca but the Base store is of US store

I am. Unable to clear cache Please help me out Anyone can suggest me regular expression for? /clear=true also