Instead, the expert advises a rational approach is best, with working out which tariff is the right one often a "complex process".
"Never switch on the spot; always take away the quote and double-check it with an independent price comparison service," Mr Todd explains.
Comparing electricity prices on sites such as UK Power before committing to a switch of energy supplier is perhaps the wisest course of action to take.
Mr Todd's advice comes after Ofgem promised to check up on power providers to ensure they are complying with new regulations on signing up customers.
Posted by Jim Tidy
Click here to run an energy price comparison, and see if you could be paying less for your gas and electricity.