Cleaning lens elements in Nikon serie E 50mm 1:1.8 with Hydrogenperoxid and cleaning solvent's

Cleaning lens elements in Nikon serie E 50mm 1:1.8 with a mix of 25ml water which I put through a coffee filter bag, and 50ml Hydrogenperoxid 3% and for the final cleaning I try both lighter fluid and "Eclipse" sensor cleaning solvent.
It turn out to okay fine, but there was some mark's on the back lens element, that I could not take away.
To unscrew the screws and the retaining rings you should use a JIS crosshead screw driver, but I use a modified PH00 crosshead screw driver.
It can sometimes be a REALLY BIG problem to loosen some of the screws, and also the retaining ring that hold the lens elements in place, that's why I use "nail polish remover" with Acetone, simply to soften the thread locker.

Here are some link's to different repair tool's:


Japan Hobby Tool rubber cone:

https://www.amazon.com/Japan-Vacuum-C...


18 different size rubber repair tool's:

https://www.amazon.com/Sizes-Lens-Fil...


Divider Caliper Wing Compass:


https://www.amazon.co.uk/Divider-Cali...


You can also buy this set.

Lens Repair Set with pointed, flat, half flat tips:

https://www.amazon.com/dp/B00QRPWCN0/...


JIS cross head screw driver's:

https://www.amazon.com/Moody-Tools-58...


Or this set, that is the set I use:

https://eustore.ifixit.com/en/Tools/D...



Lens cleaning wipes (PEC-PAD):

https://www.amazon.com/dp/B0161VIZZ8/...


Thin Cotton Buds x 200 you can buy them here:

https://www.muji.eu/pages/online.asp?...