1)There shouldn't be any water in the mangoes. So wipe them dry.
2)The oil should float over top of the mangoes, this prevents the mangoes from getting spoiled and moulds forming.
3)The jar you use should be really clean without any moisture.
4)Use dry spoons when serving the mangoes.
5)This pickle stays good for a year at room temp.
6)Oil should always float on top of the pickle, whenever you see oil reduced, add more oil and cover the mangoes.