Cheers for the replies – still unsure what to do.
@ awhiles, so when I slow for more technical parts of riding, if I have been bumbling along at a fair pace, it’s hard to cool down?
@ nicolaisam, it’s on glasses that are deisigned to be ridding on a bike (Endura Stingray) and are vented for aiflow but still seem to get the problem. Once steamed up, there is then condensation running down the inside so no amount of airflow seems to clear this.
What does anyone else do?