Just don’t.
I thought I was amazingly clever wrapping up my ball of new bluetack in clingfilm before taking it somewhere. No fluff. No stuck together bag. No greasy marks on anything. However. Once again I realise that some good ideas just aren’t good when put into practice. I didn’t use the blutack in the place where I took it, so I brought it home again and went on holiday. Maybe it would’ve been ok short term. Whatever. The point is, it was unpeelable when I tried to unpeel it just now. I gave up after wasting too much time on it, and now have small bits of overstretched clingfilm mixed all through the ball.
Argh.