4 days seems a little too short, unless you have very small wispy buds.
A slow dry 6-10 days buds still on stems/branches. most leaves trimmed off.
complete darkness with slight air flow ( but not directly on buds).
dry out bud feels crisp, but still spongy.
Then I cut them off stems into a plastic grocery bag.(resin will not stick or absorb into it).
with plastic bag open I place it into a large paper grocery bag and roll it down a little.
then I set it on floor in closet, I check it every 4-6 hours.
First opening...stick your nose in the bag and smell. you want fresh, earthy, floral, sweet...
if its kinda grassy its too wet yet take out and let it air dry more.
if its smells ok, give the buds a gentle stirring and roll er back up.
some strains will change the smell through this but still smell good, it allows for a better transition between drying and curing.
When you go to jars after hanging, and they are not dry enough... they can go to bunk real quick.
But if you use the double bagger way, your buds will have a slower drying time (allows more chlorophyll to be released)
after a few days then I jar and burp...works for me every time. :)