I lost many rooted cuttings due to over-watering, fungus gnats but also found out that there are many other ways to lose favourite cuttings.
While rooting cuttings using baggie method, I always open the bag every other day or the latest on the third day to give them fresh air for a while. I am careful when it comes to cuttings but last mid-March my desk was busy looking with personal income tax papers, so I spread the cuttings from different bags in different places for fresh air and later put them back in the bags and in the warm drawer. A week plus later I found five of my favourite cuttings forgotten and sitting on the book shelf, well dried up!
Now I always think that those cuttings would have nicely rooted and shooted.