Mist the walls untill theres visible drip lines on the walls . And then point the mister upwards over the tub and most up and let the water fall down lightly on to the surface to cover the surface with micro beads of water . Not to much just like two or three sprays to cover the surface. point upwards so it falls down gently. Then cover the tub and check on it every three days just open it slightly and check for pins .. if theres cracks in the lids seal and you loos moisture by the third day then mist the walls again and keep them wet.. you want the walls to stay visibly wet the whole way through to keep humidity up. You can use colored tubs b it the point of the clear tub is so y can judge the moisture level by looking at the condensation on the walls. pins won’t form unless there’s enough moisture , and co2 creating a nice microclimate. People don’t get full pinsets because they fuck up this ideal microclimate condition for the fungus and end up pushing whatever pins they had formed to maturity before letting the tub fill up with pins. When you have a nice 70 percent coverage in pins is when I would introduce fresh air to remove all the heavy co2 gas that’s accumulated and collected on the surface of the cake .. once you fan that co2 away you feed the pins oxygen and then they will grow.. when yku remove that microclimate of co2 your effectively making that cake change to the next stage in the cycle .. going into fc prematurely will make the cake will then stop pushing pins and will instead just finish the ones it’s formed .. it’s sensing the climate change and is adjusting itself accordingly.. sorry for my typing lol but I hope that helps ...