I have the biggest percentage of milky trichs when my plant shows 10% to 20% amber. I have grown white widow just about everyday for the last 8 years. Tried it sooner and tried it later, this seems to get the best effect.
No matter what, it won't change things. I can't understand why you would weigh it wet in the first place. One sure way to increase the wet weight is to leave the root ball on.
Nirvana White Widow from a pack of 20 seeds. Only one came out nice. I have kept this same plant/pheno for well over eight years now (cloned it thousands of times)