Ok whatever, I will remove those rules from robots.txt.
Can you please suggest me a solution to stop google from indexing those resources ?

it worked when i empty the cache or deactivated the plugin.

What is the best way to speed up website loading, as i can see using w3 cache plugin helped my sites to load faster but i dont thing returning users will see any changes made to the website if i use w3 cache plugin.

Thanks !