A Rebellious vinegary Starter

hey im a bit new here, and i made my starter about 5-6 months ago. and it was the greatest starter in the world!! great flavor, incredible dormant to awake timing(less than 4 hours lag!!) i could even use it straight from the firdge to the dough and it would rise tromendously with great oven spring even though it had a room temp over night ferment after shaping.when i first made my starter it was already active 2 days after the making of the dough.

stats

hydration- 100%

type- sourdough wild yeast

flour- whole wheat

it was the best starter i made but alas a accident occurred i left it in the open for 3 days when i was going to feed it but circumstances made me forget and it was infected by every sourdough makers nightmare "The Orange!!" and mold! i had to thorw it out goodbye my trusty starter D: but luckily i had a second one it was a levain type about 50% hydration. and i made a second starter using that but added more water to make it 100% but for some reason after a few weeks it smelled like vinegar! barely any bubbles in it a all(my old one made enough bubbles in the rise to lift the cover, Yikes!) but i didnt mind at first and so i made a couple batches with it but the all ended so flat and vinegar sour! i think my starter is overrun by aceto bactr(bactre?)! has anyone experienced this problem before? and how can i fix it? i have tried adding commercial yeast and a bit of milk in small amounts to balance things out in there, but nothing seems to work! my stiff starter is still fine very healthy, good aroma like my first starter and produces plenty of hooch. any suggestions? should i scrap my second starter and the next time i split my stiff on add water to bring up the hydration?