It does indeed say membrane in the forum description - and scissor. And laser
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For a membrane keyboard, I wouldn't waste time trying to clean it. Unless it is a really top quality keyboard, you'll spend a lot of time disassembling it, cleaning it, putting it back together, and maybe it will work, maybe it will still have problems.
If this is a situation that could arise again, one trick is to buy a couple of keyboards at the same time. Most membrane keyboards are nowhere near the price of a mechanical keyboard, so this is usually a viable option.
I have had many PCs over the years, and each one came with a membrane keyboard. I kept a lot of them long after the computers died, but I ended up throwing a couple of dozen out (while still keeping a few lying around just in case, although now I have a small mechanical keyboard collection that I use exclusively).
