(Well I'll see if it works this time, this is the 3rd attempt to reply -- the computer and the connection are both acting up tonight :sick2

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This topic is an oldie but goodie -- do a search and you'll find lots and lots of good information... The Truth is out there!
OK, then...Here's my contribution...
DeOxit Gold is a great contact cleaner/deoxidizer and is meant to prevent oxidation from returning. I use it on all electrical contacts including the ones on all batteries. It might just be me, but I can see the lights I treat as being brighter, longer.

However... it is NOT a lube.
I do not use Nyogel myself (I use a pure silicone grease), but it is a good lube. The grease I use keeps my lights working smoothly and helps to prolong the life of the o-rings while helping to keep moisture out. It is a great lube.

However... it is NOT a contact cleaner.
I see a lot of confusion or misinformation in posts lately. In some cases people are using the right products for the wrong reasons.
Here's the deal...
- Read the label. It will tell you what a product is meant to do, and why it is different. For example: DeOxit (red) is a contact cleaner/deoxidizer. DeOxit Gold is meant to prevent oxidation from returning in addition to cleaning and deoxidizing electrical contacts. They are different products for that purpose, but neither one is meant to be used as a lubricant.
- Read the owners' manual. Some parts of your light might not work if treated with the wrong product.
Some o-rings do not like petroleum products. I see a lot of people using oils, petroleum based gels or lubes, or sprays on their lights. Be careful!
- Do a search. There is a lot of information available. Understand that there is some debate, however. Research the information carefully and know that sometimes products can be discontinued, re-formulated, or that sometimes people will find out about a product but not use it for its intended purpose.
It might be best to search out the information already on CPF, research it a bit further (maybe there is an MSDS -- Material Safety Data Sheet -- on the product which will give you the ingredients and its intended use), and then ask questions. We'll all find out more accurate information and get it faster, too. In addition, we'll be treating our lights properly.