Tips on how to pronounce the Spanish "rr" trill?

Anyone have tips on pronouncing the Spanish double "r" trill? I've tried for over 3 months already and I still can't get it! I've looked up tips on the Internet too, but none of them seem to work for me. Any tried-and-true tips from people that can actually pronounce the "rr"... show more Anyone have tips on pronouncing the Spanish double "r" trill? I've tried for over 3 months already and I still can't get it! I've looked up tips on the Internet too, but none of them seem to work for me. Any tried-and-true tips from people that can actually pronounce the "rr" trill?

Thanks~
Update: Is the tip of the tongue curled, or is it parallel (flat against, I suppose) to the roof of the mouth?
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