Starting trying to make compost in a compost bin towards the end of last summer. Basically using grass cutting, shredded paper, toilet roll holders and egg boxes. I also put in veg peelings like carrot, potatoes etc. Every now and again i stick the garden fork in and try to mix it all up. Today i tried to get some compost out the bottom of it and discovered long white stringy roots, think its possibly from the potato peelings? Is this common and/or is there something I can do about it?