Toyota GB's tips reducing condensation:  https://mag.toyota.co.uk/fix-condensation-inside-car/ Air con - winter use:   https://www.rac.co.uk/drive/advice/car-maintenance/air-con-myths-busted/ Demisting quickly:   https://www.rac.co.uk/drive/advice/winter-driving/how-to-demist-your-windscreen-in-double-quick-time/ Also folding the sun visors down helps trap more of the demisting air against the windscreen.