Summer PSA: To all of those who are affected by random disc ejection.

Here's a few solutions: http://ift.tt/2tBfyQJ

And another solution missed out is to try to keep your PS4 as cool as possible, by placing an external fan near it or just cooling the room it's in by opening window, changing your AC etc. Overheating is the main cause for most problems here, and is especially bad in the Summer.