Stylus stuck in groove.

@rvpiano I've occasionally come across a record that skips. Each time it was a damaged record (scratch). Can you see the troubled area under a magnifying glass? It might not be dirt.

I have successfully used small alcohol wipes while the LP is on the platter, then a wipe with an eyeglass cloth: but some like you describe are stubborn.

Stop being a Sissy, scrub the bejesus out of it manually. (baby scalp brush).

My mix: start with ’record cleaner’ liquid; strengthen it with alcohol; slime it with a few drops JetDry dishwasher spotless stuff; the spinner is made for cleaning, but I use it only for rinse with distilled water, then a light touch of cloth to remove excess water, then into the rack to dry.

I keep the paper label dry using a lid from a soup container.

@pindac   +1.

Written by a high class expert in cleaning, who's generous to boot. We're lucky to have access to that level of expertise.

@terry9 The Type of solution referred to in the post prior to yours resembles the type of Solution I had been using for many many years.

The ratios to create mixture as shown in the PAVCR has produced a solution that has been able to decontaminate my LP's of all crud seemingly left as a unwanted residual from previous cleaning solutions and practices.

The PAVCR maunual cleaning methods supplies a Cleanliness never before achieved by using any ratio for a mixture produced from IPA - Distilled Water - Non Perfumed Detergent mixtures. 

The Author Neil Antin has been extremely kind in their offerings to help preserve Vinyl, which a large of Albums has sentimental value resulting from very long term ownership.

I once bought a used record that had something so gooey and gluey that nothing would remove it, and trying just made it worse. As a last resort I used Goo Gone with a microfiber towel on just the contaminated grooves and it worked brilliantly.

I followed up with my standard ultra-sonic deep clean and rinse.

For future reference.