Clearly the mysteries of nature are indeed afoot. Or someone knocked it, rendering the sealed experimental environment somewhat less uber-pure. I'll let you form your own opinion.

Come back soon to see some more radical grape-shifting - potentially.

I exaggerated just a little. By sealed enviornment, I more meant sometimes I shut the door to the room (although sometimes not) than any in depth airtight anthrax-proof containment strategy. I think I just wanted to sound like a real scientist :-)

It's really quite warm today, so I am hoping for a quick boost to the raisinification.

Hey, I like the idea of foil. From previous growing experiments I am led to believe that whiteness is better that silver for reflecting light, but I would imagine foil would add extra heat and hence drying power.

Outside scares me a bit because of a) the neighbours might get jealous of the sheer science that is going on and steal it, and b) already a gust from an open window led to a traumatic grape-to-floor incident. However, with appropriate supervision and perhaps some DIY construction it may indeed take things to the next level.

Thank you for your suggestions. Please may I ask of the outcome of your experiment? Tupperware box probably didn't help so much!?