If you are doing TR (tight regulation) you try to hold the same dose for 3 days or 6 cycles. Then reevaluate. Unless Wenchie has other ideas and drops really low before those 6 cycles are over (She walks to a "different drummer", is doing the "sugardance to her own tune", so I fully expect her to walk to her own beat.) ECID Every Cat is Different and Wenchie certainly proves that maxim.
If you are doing SLGS (Start Low, Go Slow), you try to hold the same dose for 1 week. Then reevaluate.
Right now, Wenchie has only been on this 1 drop dose for 2 cycles. We need to let the lantus insulin "depot" refill and see where that takes her BG levels. In any case, weather using the TR or SLGS protocol, the dose should be held for 4 more cycles.
IF and it's a very big IF, Wenchie does not drop too drastically low like she has in the past.
You have not selected one of these Lantus dosing protocols and you need to.
The complication is, since Wenchie is on such a low dose of insulin, drop dosing, the normal guidelines of how much to raise the dose by for a particular BG range do not apply. So instead of using the more common increase/decrease strategy of raising/lowering the dose by 0.25U increments or 0.50U increments, we'll have you raise and lower by drops.
As far as when to raise and lower, that will depend on Wenchie and if you choose the lantus TR or SLGS protocol.
p.s. Did you figure out yet how many drops you get from the 0.1U measurement?
"If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away." - Henry David Thoreau