Pronouncing "qu"

[i__forget 15]

After some years of studying Chinese, I still find myself not being able to properly pronounce "qu". I can pronounce "yu", "ju", and "xu", "qi", etc, so I have no problem pronouncing the initial "q" and the final "yu"(ü), but for some reason when I combine them the result sounds like "chyu" (chü). This is not clear to me as I'm talking, it's only clear when I hear a recording of myself. 

Anyone had this problem before? Any suggestions?

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[Jan Finster 289]

Best if you upload a sample of your pronunciation so people can give you better feedback

 

I believe it is a challenging pinyin sound to produce as for "q" your mouth is wide, while for the "ü" it has to become small and round.  But since you do not struggle with "xu" (which should be even more challenging), I am at a loss.