No, for the first fill I drip into the cartos- but only about 5 or 6 drops max - then replace washer and cap and leave for a while upright. For subsequent fills follow the last method.
sorry but just to inform you only putting 6 drops in on the first fill will decrease life rapidly, you can get any where near 18-20 drops in on first fill and thats being conservative,
for the first fill in 5 minute stages add 8 or 9 drops then 6 or 7 drops then 4 or 5 drops, the filler should look wet but not pooling.
as for
refilling, the condom method is the only way because the outer cap will break/tear when you try to remove it, it is messy in comparison with most models on the market
however you can do what i do:
what i do is use the rubber bungs from dead carto's(washed of course). instead of putting the white outer caps on use 2 rubber bungs from old carto's. that way when they run dry you can drip a good 10-14 drops straight in the carto as the bungs are a piece of cake to remove.