This is the simple trick I use to prolong the life of my pieces: mist your jewellery with clear enamel.
Don't spray it directly as it may leave a white film, so mist it.
This product is available at hardwares and craft stores.
Get more value for your money by making the items last longer.
I was reminded of this tip I use when I was on Facebook and someone (Cheapalicious) had a post saying she couldn't wait to try it.
Some people also use clear nail polish but the enamel works better I find.
The story behind this tip is a friend of mine that does patio & garden art pieces (www.sanzisart.weebly.com). She used it to finish her pieces so that they wouldn't fade and I thought what a clever idea so I decided to try it on my costume jewellery.
Also if the colour fades or something, you can use nail polish to bring life back to an item.
XOXO
Ronz