I'm not sure if this is at all related, but when my DH had to give a sperm sample (for fertility investigations), we had to keep it warm on the way to the pathology place - it usually liquified after a few minutes of being kept warm (this was what it was supposed to do).

Anyway, I would suggest if you're not inserting it straight away to at least keep it warm (I always found in my cleavage was perfect ) to keep the swimmers as healthy as possible.