Hairspray, lotions, and perfumes can be very harmful on pearl diamond rings. In addition to that, the chemicals in house cleaning agents may degrade the surface of pearl diamond rings, which will, in turn, make the ring look less appealing. So, you should make sure to remove the ring from your fingers before showering and cleaning the house.
You will need to invest in a designate pearl cleaner to clean your pearl diamond ring. If you have no clear idea on how to clean pearl engagement rings with diamonds, then it is best to take the ring to a professional cleaner; else, you will end up damaging the ring.