Consistent Source Of Sufficient Heat
As everyone knows, heat is very beneficial with jelqing, and according to the forums, wet heat is the way to go. The heat options I have read are hot wrap, microwave rice sock, IR lamp, halogen lamp, and heating pads. If these methods already work for you, then great. If not, then I would suggest getting a coffee maker.
I got a 5 cup coffee maker for $12, and it was from a reputable brand. I tested it, and it heats the water in under 5 minutes, very convenient. It is also quite small (length is about 12”, diameter is about 6” (or 19” girth, whichever measurement you prefer) so it is easy to store and hide from family members). The temperature gets up to 200 degrees, so all you need is about 1/2 cup of heated water (brew without the coffee) and 1 cup of 65 degree F water for a net temperature of 110 degrees, right at the top range of comfortable heat. Heating feels much better with the properly heated water. All of the numbers are there, but be sure to do what is comfortable for you.
Hopefully this helps some fellow stealth PE-rs. I know not everyone can consistently use a lamp or microwave sock in case they are discovered, so getting a small coffee maker is effective and also easy to hide. Just make sure nobody sees you carrying it out of the bathroom.