I don't know what the kit(s) came with originally -- that was over 20 years ago. But when the applicator bottle is empy I refill it with iso and have been doing this for over 20 years with great success. Denatured alcohol by definition, contains additives, e.g., methanol, isopropyl alcohol, acetone, methyl ethyl ketone, methyl isobutyl ketone, and denatonium.I've always wondered this but with the cleaning kits they come with some solution that isn't always mentioned what it contains (probably just isopropyl or denatured alcohol) but does that stuff expire? Do you all use the same solution or just toss that and refill it with something else?
It is a concern. Where I worked, we used a dedicated platen cleaning solution, which I think also claimed to partially rejuvenate the rubber.Also I recall an older coworker at my last job (we fixed everything we could ourselves being a tight budget state agency) regarding cleaning printers at least he swore by only using denatured alcohol and not isopropyl because he said isopropyl would dry out the rubber on the rollers (laser printers). Is that a true concern?
The second head (the top one) on your 360k drive is physically damaged. You will need to replace the drive.
The 180k format is a result of DOS thinking it is now a single sided drive.