If you're a "Penny-pincher" as I am, use a hammer & chisel to remove the hard stuff. Just be careful not to use a lot of muscle when hammering- tap the chisel.
This should remove most of the caulk. Finish by using a putty knife or scraper. Be sure to thoroughly clean the area with alcohol. This removes the 'oily' residue and helps the caulk adhere. ... View related article.
Remove ALL old caulking (use a thin putty knife), clean entire area (I use rubbing alcohol)- let dry, then apply a high-quality, about $5/tube, Kitchen & Bathroom caulk. Should take care of your problem. ... View related article.
Check these in order: 1. Lint filter-wash with dish soap and warm water. 2. Clean the dryer vent line. 3. Heating element burnt. Buy the assembly- it costs a little more than a new element, but much quicker and easier to install. 4. Check thermostats and limit switch (could be 2 or more). Here is a very helpful repair site for all appliances, including a free repair forum to get expert help. I've fixed our fridge, range, washer, and dryer using it- http://fixitnow.com/diy-help-sitelet/... View related article.