New to starters with a question

Toast

I'm no expert, but I can share my limited experience with you.

On day three I read it as, you fed the starter three times with the same amounts each time, but did not discard any excess. This in effect means that you are feeding a bigger and bigger starter with proportionaly less food. It sounds to me like you starter is dying of starvation. This is further evidenced by the fact that liquid is starting to form on the culture.

I would throw away all but 50g of the starter, add 100g of flour and 60g water (just my preference) you can add whatever proportion of flour and water as a feed providing that there is more flour in the feed than you have starter. Do this every day until your starter is firmly established.

No doubt there are folks with more experience who will chip in, but this worked for me when my starter became sluggish.

I understand what you mean, but this is not exactly what has happened...

Day 3 and Day 4 instructs to discard half of the starter and then to add to the remainder 1/4 cup flour and 2 tbs water. But the instructions for Day 4 also say:

 

Before you do your Day 4 additions, you want to make sure your starter has at least doubled.  If it doubles in less than 24 hours, you should still wait until the 24 hour mark.  If it takes more than 24 hours, be patient.  Let it double.  It may take another 12 or 24 hours, or it may take longer.  Again, be patient.  It will double.  Just give it time.

If your starter hasn't doubled after 48 hours, you can boost it with a shot of rye flour.  Add 3 to 4 tablespoons of rye flour and a bit of water (try to keep the hydration level about where it was) and mix it up.  Then wait for it to double before proceeding with the Day 4 additions.

So, because my starter had not doubled I boosted the starter with rye flour as instructed.

Because the first time that I boosted the starter didn't produce any growth I boosted it a second time, which then caused it to grow.