Actually I have a dedicated soldering iron for all my Deans Plugs and battert leads.

Its an Orange colored WELLER SP-23 (23 watts) with the worst looking tip you ever saw.

Tip is seriously eroded and has the perfect shape for transfering the heat to the flat Deans solder lugs as well as wrappinga around the 16 ga battery leads.

I'll be sad when this tip finally erodes to dust !!!!

The name of the game in soldering is good HEAT TRANSFER, as I can solder all my RC projects with a 23 watt iron. Connections are nice and shiney and I'm not cooking any nearby components or insulation in the process.

Also, get rid of that wet sponge you all are using to clean your tips with... That sponge is only making things worse.

Find one of those shredded brass brillo-pad looking tip cleaners at a supply store. Works great and does't cool off the tip too much either. I think mine is a weighted RV ashtray that someone sells with the brass turnings in it from someones machine shop floor!!!!!

Soldering is nothing more than a practice item, we all get better the more we do it.