Question about rubino/goldpink

[Lampwork_newbie:)]

I have a question...
I love the rubino color,and it's soo lovely when I use it alone.
But when I use it on top of other colors it sometimes turn clear with a hint of pink. what am I doing wrong?

[villa design]

You're overheating it. :) Keep it cool in the flame... toward the back and work it slowly.

[Cosmo]

Turn your oxygen up and work it way out in the flame. You want it to stay nice and pink the whole time you are working it.

Some people say they have luck heating it up and then striking it back to pink after it's clear. I have never been able to do that. For me, once it goes clear it stays clear.