Using a Parve Mixer for Milchigs
37. One may use a parve mixer for milchigs if all the ingredients are cool. Although the mixer heats up a bit from the speed of the beaters’ rotation, it does not reach yad soledes bo. It must be cleaned well after use so that no milchige substance remains.
Using a Towel to Cover Pots
38. On Shabbos and Yom Tov, people sometimes cover pots on the fire or hot plate with a towel. One must be extremely careful to keep the towel very far from a fire source so that he does not start a fire ch”v. If it is Shabbos, one must make sure the towel does not cover the pots on all sides. Otherwise, it is an issur of hatmonoh with something that adds heat even if he covered it Erev Shabbos (שו"ע סי' רנ"ז ס"ח, רמ"א סי' רנ"ג ס"א ).
39. Covering both fleishige and milchige pots. One may use the same towel to cover both fleishige and milchige pots at the same time if each pot has its own cover. The same goes for fleishige or milchige pots along with parve pots. The reason is because when the pots have their covers on, the moisture does not go into the towel (נועם הלכה סי' י"ז אות ט"ו ).