Thanks for the question regarding contact enhancers.
My experiments with contact enhancers began over 15 years ago. If I remember correctly, the degradation of these products took place over a period of months. While some were very effective initially, they all eventually began to dull the sound, mainly in the high frequencies.
Enter Tim and his "Total Contact" contact enhancer. Tim contacted me via PM around three years ago and asked me if I would like to beta-test the product. I told him not a chance because of my previous experiences. Over about a three-week period of trying to convince me, he finally did.
On the PPT "Total Contact" ... I have had some contacts treated for around three years now with no degradation. When I talked to Tim about this, he said that he did some custom work on circuit breaker panels for customers over ten years ago, and still no degradation.
To further discuss your questions; the Total Contact dries to a hard plastic-like material. That is the "curing" process that I alluded to in many posts. This is why one has to have patience with it.
In some applications, it will degrade the sound initially. When I did the inside of my power conditioner, for example, I used an entire tube of TC to get the job done, and laid it on thick. It sounded like crapola for at least a week and a half. Bass became muddy, and the mid-bass was almost non-existent. The system was boring to listen to. Tim kept ensuring me that everything would come back better than ever. Sure enough, it did, and I was more than delighted with the results.
During the curing process after pasting the "normal" connections, like spade lugs, IC and PC’s, there wasn’t a degradation, but an improvement. After pasting the "normal" connections, Tim told me that I would hear a big jump in SQ at four weeks and then another BIG one at eight weeks. Sure enough, right on schedule, there it was. It was the curing process taking effect. The improvements in SQ at both of those time periods were quite dramatic.
You shouldn’t be concerned about removing the TC. A cotton swab and rubbing alcohol will remove it rather easily.
Hope this answers your questions.
Frank