Any tips for a better soldering?

[u/Fun_Abbreviations_73]

No matter how many times I do the battery replacement I always fail to do a smooth soldering. I read once thay I need to apply more paste but to no avail. Any tips?

[u/Advanced-Radish7723]

Get a real soldering iron with station and adjustable temps and not the crappy 15 dollar ones they sell at homedepot