Welcome to SCS! You're going to love it here.
I think maybe you're talking about the crease? I use a bone folder that I purchased from my local craft store.
For cleaning my stamps, I have a Stamp N Scrub from Stampin' Up! And I use UltraClean by Stewart Superior.
As far as adhesive goes, I prefer Tombow Mono Multi (available at local craft stores and through your Stampin' Up! demo), or Scotch Quick Dry adhesive (can be found at Target & Walmart in the craft section).
If you have any more questions, feel free to ask...everyone here is happy to help!