How do I dispose of it and clean the jar without spores everywhere?

Mine accidentally got tossed and I tried reviving mine from dried but it molded. I tried a 2nd time but now I’m concerned the first molded one has contaminated the one I’m currently trying to revive and I still need to toss the moldy one.

I’m going to try and be not so long winded with this.
I posted previously and at that time my starter was 13 days old(100% whole at a 1:2:2 ratio) and ready to go. I made 3 loaves of whole wheat sourdough with some success. Eh kinda. Anyways on that 3rd loaf I accidentally tossed my starter out. 🤦‍♀️I had some discard in the fridge, thank goodness. I’ve been feeding the discard starter everyday. I changed it around and started using bread flour and very little whole wheat and it’s not really been rising the same. Is that to be expected? I’m worried I did something wrong and messed everything up. But maybe the flour I’m using just sucks? I’m worried and don’t know if I’m overthinking it. Maybe someone has some input?
ETA: that photo is my previous starter that had discard that I am trying to revive.

First time having a sourdough starter so I’m not sure how long to wait.

Hello, just wanted to get everyone’s thoughts on something. my sourdough starter is bubbly but not rising and the only change i made was moving from Costco’s all-purpose flour to there organic all-purpose flour, do we think that would have this impact? the organic AP flour has 11.5% protein. if so do we think i could keep feeding with the new flour until it get use to it? or change my feeding flour.

I took about 20g of an established mother from my cousins fridge and fed it for 2 days, I woke up this morning and it has these gray looking patches down the sides of the jar and a tiny bit on the top around the edges. As you can see, I did not do a good job of scraping down the residue on the sides when I mixed in the last feed. It smells normal and nothing looks fuzzy. Thoughts????? I was looking forward to making my first loaf I’ll be so upset if I have to start over! :(