By Genik
Kansas,
United States 
The cuccs are a bit over ripe that is causing the yellow ends.
23 Jul, 2012
Answers
Hi Genik! Have you seen this site - it might give you the answer. Good luck!
http://ask.metafilter.com/220224/Can-these-overripe-cucumbers-be-saved
24 Jul, 2012
Pick them a lot earlier, this also encourages more to grow.
24 Jul, 2012