add a drop or two

goncang like mad for a minute or two

steep for an hour or more

try out
repeat until ok.

or replace water with PG. PG 100ml is just RM5.

Last month I order items from FT, i use Chinapost.. receive it within 14 day

for cotton, either Muji or Koh Gen Do is good

https://www.fasttech.com/products/3033/10011538/2126500

https://www.fasttech.com/products/2190000  << this one i order before.. really good cotton, flavor is better than any other cotton i've used before

Sweden Post = For shipping batteries. Dont use it for other things as this one is pretty slow.  China > Idk where > arrive sweden > goes around the world > malaysia

DHL = DHL HK doesnt ship to malaysia as it has problem with customs. It wil be downgraded to EMS in many cases but since i dont see EMS in your list, i assume its unavailable so most probably will downgrade to free shipping and they will refund you.
External charger (authentic) charges slow to protect the battery keeping it healthy and doesnt make a hole in your face.