Cant delete cookies facebook signing problems?

having problems signing into facebook, just keeps taking me back to the home page. have tried to delete my cookies and browsing history so many times but it wont delete them? would love to find the answer to this as its been driving me nuts for months, please keep your answers basic, not too clever with computers... show more having problems signing into facebook, just keeps taking me back to the home page. have tried to delete my cookies and browsing history so many times but it wont delete them? would love to find the answer to this as its been driving me nuts for months, please keep your answers basic, not too clever with computers :) thanks
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