Reddit reviews Kimberly-Clark Kimtech Science Kimwipes Delicate Task Disposable Wiper, 8-25/64" Length x 4-25/64" Width, White
We found 7 Reddit comments about Kimberly-Clark Kimtech Science Kimwipes Delicate Task Disposable Wiper, 8-25/64" Length x 4-25/64" Width, White. Here are the top ones, ranked by their Reddit score.
Low lint and low extractablesAbsorbs 18% more water than other private label wipersAbsorbs water 24% faster than other private label wipersOne-at-a-time dispensingWon't scratch delicate surfaces when wet
The cdc website she linked to says to rinse with solution (never water) and wipe with a tissue. Maybe invest in some kimwipes:
https://www.amazon.com/Kimberly-Clark-Kimtech-Kimwipes-Delicate-Disposable/dp/B00RORBXA8
I've been wearing contacts for 22 years and this is news to me.
Someone had suggested these, but I just used an old cotton t-shirt that had been through quite a few washes. Someone also suggested to just use paper towels. Reason being, if my old shirt would have gotten caught on an SMD component, it could end up tearing the component off the PCB, but the paper towel would have just torn.
I did have to scratch a bit, but that could be due to residue having been there for a little while. Like I didn't clean it right after soldering :P Basically what I did was wrap my finger in my shirt (one layer) then rub at it. Sometimes I would use my nail, still with the shirt wrapped around my finger, to scratch at it.
I got my spanner from Amazon, maybe $20 and it's just fine, has ends that flip for pointed or flat-blade, no problems.
First, I'd go to apug.org and do a search for fungus, lens, cleaning, etc., try a few and there should be a lot of info. There are guys that suggest some particular hand lotion for really stuck fungus, sort of barely-abrasive.
On the RB lenses (and many others), you remove the logo ring first, the ring around the front element that says stuff like "90mm 2.8" and so on - you have to find a rubber stopper that fits, or press a rubber glove onto it with something. If you have a front ring without spanner holes, take it to the hardware store and look for a rubber sink stopper - or a "fernco", which is a short rubber tube with thick walls, used to join two pipes together - they usually have pipe clamps on the ends. (Fernco is a brand, they're "flexible plumbing adapters"). Just something that will press on the lens without hitting the glass. You push down hard on it (if necessary) and use it to get the ring loose, and then unscrew it. They're just a couple bucks.
In my case, the front element then lifted out, and the fungus was on the lens group under it, which (I think I recall) had a ring that needed the spanner. I took the element out, blew off any dust, and used a q-tip with peroxide - I'd try not to "soak" anything if possible. That took the spot of fungus off, and I then cleaned the element (I use ROR optical cleaner, but 99% isopropyl alcohol is a great lens cleaner. 99%, not the 80% grocery store stuff which has oils and additives). I can never get the last swirly marks off, so I use a pristine, clean microfiber cloth for a final polish. (By the way, Kim Wipes are an awesome thing to have handy for cleaning lenses and negatives). And use a rubber blower every step of the way, while the lens is open go ahead and get all the dust out.
When you finish cleaning and reassemble, cheap cotton gloves are really a big help - it's easy to get 90% done and spot a big fingerprint on some glass and have to take it back apart. I wear these when I sleeve negatives, spot prints, and frame and matte prints too, another must-have in my opinion.
You can disassemble a lens pretty completely, and if you start seeing lots of parts to remove, take lots of photos, draw a diagram, etc. I save all those tiny clear bags that parts and things come in, and put screws and parts from each step in them - tape them to a sheet of paper and label the paper, like, "step 3, lens group set screws" and make notes and sketches (that way you can reuse the bags).
Good luck, do a little research and take it slow - hope your fungus is an easy spot!
I use the same thing I clean my eyeglasses with: Kimwipes and Zeiss lens cleaner.
The most useful tool for me is some lint-free KimWipes and pure isopropyl I grabbed from the lab! So easy to clean off electronics and old thermal paste. Wouldn't build a machine without these!
Coffee filters work well if OP doesn't want to buy a proper cloth. Also, if you are often cleaning things with microfiber cloths that get really dirty, try out kimwipes. Disposable so you don't have to worry about re-depositing oils.
Breathe on it to fog the lens. Wipe in a circular motion with a Kimtech wipe.
If that doesn't do it, spray some Pancro cleaner on a Kim wipe and wipe in a circular motion.
NEVER spray Pancro (or any other cleaner) directly onto a lens.