I would never eat anything that had the slightest amount of mould on it or near it. Just because you cannot see the green colour, doesn't mean that the mould is not there.
Bingo. I used to do the same until I took a science class and saw up close how the mold's tendrils snake all over food/cheese, etc. before it can be seen with the naked eye. Something has a spot of mold? In the trash it goes. Bread goes in the freezer. Keeps for a long time.
Cheapest person I knew was my lesbian roommate in college. I was sick with strep and decided to cook myself a meal at the house since I was too sick to go out. She saw me use a shake or two of a spice she had in her cabinet and complained to my sister that "I was going to replace that, right?" She saw me use the guest towels that she had in the guest bathroom - "my" bathroom' in the house - and complained 'Those were for guests." So I washed them. She both kept them and made me buy her new ones as well.
She didn't like the cat hair that got on the comforter in my area of the house and so I promised to wash it and get the hair off. I washed it at the laundromat and made sure the hair was brushed out. She said that wasn't good enough and made me dry clean it as well.
My cat knocked over half a can of paint in her garage. I cleaned it up and offered to buy another can of paint. She said no problem, she'd buy it and I could pay her back. She bought an expensive brand from a paint store instead of the Walmart brand that had been knocked over..
I got fed up and once, let her watch me eat some cereal out of her box of cereal that was only half-full. She saw me and asked if I was going to replace it. I said sure, no problem. So I went to the store, bought her brand of cereal, came back to the house and in front of her, tore open the new box, poured half of it out into a baggie and resealed the box. "Here," I said, "Here's the half-box of cereal I owe you."
She threw me out when the lease was up.
It was worth it though.