If you think "reality" of that level, weapons and armor may rust, blades may become dull or even break, warterskins may leak, and closes will be ruined by soaking up a lot of goblin blood.
In my experience, it is better to ignore and make obscure that kind of "reality". Adding such details never please anyone. Just think that PCs are changing strings often or putting strings only when they likely to meet immediate danger. Or, your PC's magical bows may never get such kind of trouble. We are playing for fun, not for get frustrated, right?