Our process for proofing is:
Day 1 - run the macerated gin through the still, comes off at ~83.2% for the run
Day 2 - Proof to 45% abv
Day 4 - Proof to 42.5% abv
Day 6 - Proof to 40% abv
Our gin is always louchy in the tank when dropping below ~44% abv, but we rest for 4+ weeks which with warmer summer temperatures allows the gin to clear up and in winter it remains cloudy and simply clears up when filtering through our 5micron enolmaster filters. We run 32.2g/l and 34.7g/l botanical loadings in our gins too, which are macerated at 50% abv, then diluted to 40% for running through the still.
Apart from the first thorough clean when brand new, we have never cleaned these tanks (~2yrs since new) as these tanks only ever hold gin.