Whether it was intended as a gag gift for someone at the office or something to keep the kids mildly entertained, Silly Sludge can be messy fun. If Silly Sludge happens to find its way onto the carpet it can create a problem as the consistency of it makes it difficult to pick up. Though this may seem like it's going to be a permanent stain, it's deceptively easy to clean up with the right materials.
Allow the Silly Sludge to dry on the carpet so that it is hard. You can leave it to set or hold ice cubes to it for 30 to 45 seconds to harden it if you need to remove it quickly.
Scrape the hardened Silly Sludge with a butter knife to remove as much as you can from the carpet.
Pick up the loosened bits of hardened Silly Sludge from the carpet with the brush attachment of your vacuum cleaner. Running the vacuum cleaner over the area may crush them into the carpet so use the hand-held attachment instead.
Dampen the remaining Silly Sludge that is still on the carpet with WD-40. Don't saturate the area; use only as much as needed to soak the Silly Sludge.
Allow the area time to soak and soften -- about 10 minutes.
Scrape the area again with a butter knife to remove more Silly Sludge.
Continue soaking and scraping until all of the Silly Sludge has been lifted from the carpet.
Dampen a clean cloth with isopropyl alcohol.
Blot the area with the cloth to remove any residual bits of Silly Sludge and WD-40 as well as lifting any residual stain.
Blot the area with a second cloth dampened with clean cool water to rinse it.
Allow the carpet to dry. Place a fan nearby to circulate air over the area to speed the drying.