[ben]

What about a cling-film wrap   

[peapod]

worth a go with cling film and a few canes

[gawk]

Having the same problem as you with CMV so I had a look around for some helpful tips and came across this site (link below), might be useful for you.

http://forum.gardeningmags.co.uk/forumlive/topic.asp?TOPIC_ID=2831

[richyrich7]

I too think it's due to humidity, my cuckes have really struggled until I put plastic tubs with water under them, and hosed down the greenhouse floor. Like it's been said cuckes like it steamy but toms don't bit of a problem in a mixed greenhouse, try to keep an air flow going that helps the toms cope with the humidity, my peppers are growing great guns but the rise in humidity has caused mildew on some already