leaking break fluid from resevioir

why am i leaking break fluid from my reservoir when eull doesnt leak only when i drive and use it leaks i dont kow why

check the rubber hoses or your master cyclinder pull therear rubber boot away and u will find fluid

TIME 4 A NEW 1

its comming through the top of reservoir th

its leaking from reservoir and you can see fluid running down the spare wheel what do i need to change

BUYA new one and blue hoses

Stopping the leak needs to be done.When i got my beetle the reservoir had been leaking for some time and started to cause rust.It was a simple matter of checking the hoses and clamping a loose one but the rust does not go away and will need to be treated.Check under the carpet or matting for traces of any liquid where it has been sitting.