Mine was so dried up that I just had to scrape it.
But I wanted to give you a "heads up" on the "Locking" type and not using an adhesive. I tried this with a Luxury Vinyl Floating Flooring that I purchased from Lumber Liquidators (the stuff was junk!). The 1st time that the flooring came apart I removed pieces and put it back together using an adhesive, that repair did not come apart and the 2nd time that it came apart I made the same repair. The 3rd time that it came apart, all in different areas, I took it all out.
I have seen others that have experienced this separation with their Vinyl, Bamboo & Cork Flooring when attending Vintage Trailer Rallies so my problem was not unique.
I found a product the Lowes has an exclusive on called Smart Core;
I talked with the manufacturer about my installation and he recommended that I glue it down. I used Liquid Nails Polyurethane Adhesive in a pattern similar to what was recommended to install an epoxy countertop by putting daubs down from the tube to allow the assembly to expand and contract. I also used a water based flooring glue to adhere the seams.
I did this last year when it was still in the 80s & 90s and it has since been down into the teens over this winter with no signs of movement.