Cleaning cones

[sangram]

Hi

Small problems I'm facing here, would help if you suggest me some solutions or preventive measures.

FYI humidity is very high in the city (>90%) but in my rooms it rarely exceeds 75% (I have a small hygrometer). Condensation is an issue with almost everything made of steel, and a lot of things not made of steel. During the monsoon my guitars are alway wet to the touch, for example.

Problem 1: Fungus on paper cone

This is an issue that I came across yesterday. I have some 8" Peerless India paper cone woofers which are collecting a lot of fungus on the uncoated side (back of the woofer) and as a result spots are emerging on the coated side. The coating is gradually wearing away at these spots.

AFAI can tell, there is no effect on SQ, but the woofers are beginning to look quite ugly, with polka dots appearing all over the front.

I cleaned out the fungus from the back but the spotted appearance and dust spots remain on the front. Using a light oil coating on the front worked initially, but I'm not putting any other substances on it right now.

Problem 2: Humidity affecting fiber/paper cones

I have a pair of the speakers whose picture is attached:

Now the bottom pair of woofers is what looks like a pressed fiber/paper woofer (it's not plain paper) so it's resisted any attacks from fungus but the adhesive used to join the inverted dustcap to the cone, has developed a white layer that looks like a fungal attack. This is again not apparent on the front of the cone, only the back side, and is a clear white line running around the back of the cone.

The humidity problem is so bad that there is a line of rust developing that you can see if you peer into the vent of the bottom plate of all the bigger drivers.

Problem 3: Gunk collecting on Kevlar drivers

The yellow Kevlar mids are easily cleaned using soft kitchen tissue. However one has some spots probably caused by chocolate (don't ask!) or my maid's fingerprints on it. Was wondering is Kevlar is washable, so I could probably use water and a soft tissue to clean it off.

[Willitwork]

You can wash Kevlar with a soft cloth or brush and mild detergent such as dishwashing liquid. Rinse and dry with soft cloth when you're done. This works for ployprop as well, but not paper. I guess anything strong enough to kill mold carries a high risk of damaging the paper.