How long it takes before a piece needs gold replating varies from person to person. It depends on various factors such as wear and tear and how well you take care of your jewellery piece.
I always recommend that you apply creams, perfume etc. first and wait until itβs dry before putting on your jewellery.
The pH value of your skin and the products you use in your daily life also play a role in how quickly the gold plating breaks down, which is why the durability of gold-plating varies a lot.
For example, I often experience that a ring wears down quicker than a pair of earrings, as rings are often subjected to more blows and bumps than earrings. This is why I give all my rings an extra thick layer of gold plating so they last as long as possible.
If your gold plated jewellery needs cleaning, you can clean it with lukewarm water and a little washing-up liquid π