through the years i have had many hermit crabs every size/color but only two ever molted. i have had 3 very smalls and only one molted(i had them for 4 months). the smaller ones are supposted to molt like every two months right? am i doing somthing wrong? maybe all the salt water they play in is keeping them from molting? i stopped misting after it made everything yucky in my one cage. maybe they need the extra moisture to molt. what should i do???