Hi. I've noticed that the overflow seems to be leaking, but I think it's only happening at night/early morning. Sometimes I go outside first thing (around 7am) and see it dripping. I swear that if I run the hot water for a bit then the dripping stops. Need to test this further, but the floor only seems to be wet in the morning and not seen it drip in the day or evening (however I'm out at work during the day!). Does this make any sense to anyone why this might be happening? Thanks