A better way is to first mix the powder with hot water, so that the methyl cellulose particles are well dispersed (and so have a much higher effective surface area) in the water, and cool down this dispersion while stirring, leading to the much more rapid dissolution of those particles. See also
Carboxymethyl cellulose
Ethyl cellulose
Ethyl methyl cellulose
Hydroxypropyl cellulose
Hydroxyethyl cellulose

References
Further reading
Cathleen Baker (1984). Methylcellulose & Sodium Carboxymethylcellulose: An Evaluation for Use in Paper Conservation through Accelerated Aging. Preprints of the Contributions to the Paris Congress, 2–8 September 1984: Adhesives and Consolidants, pp. 55–59. International Institute of Conservation. Robert L. Feller and Myron H. Wilt (1990). Evaluation of Cellulose Ethers for Conservation (free fulltext). Getty Conservation Institute. Pijper A (March 1947). "Methylcellulose and Bacterial Motility". J. Bacteriol. 53 (3): 257–69. doi:10.1128/JB.53.3.257-269.1947. PMC 518306. PMID 16561270.
Bladder reductions have shown that the bladder will again stretch to its previous size due to lack of muscle. Complications may also arise from enlarged/malformed kidneys, which may result in kidney failure and the childs going on dialysis or requiring a kidney transplant. Many individuals with prune belly syndrome have good physical and mental health, despite all the concerns. With proper treatment, however, a longer, healthier life is possible. Diagnosis
Prune belly syndrome can be diagnosed via ultrasound while a child is still in-utero. An abnormally large abdominal cavity resembling that of an obese person is the key indicator, as the abdomen swells with the pressure of accumulated urine.In young children, frequent urinary tract infections often herald prune belly syndrome, as they are normally uncommon. If a problem is suspected, doctors can perform blood tests to check renal function. Another study that may suggest the syndrome is a voiding cystourethrogram.PBS is far more common in males. Autosomal recessive inheritance has been suggested in some cases. A homozygous mutation in the muscarinic cholinergic receptor-3 gene (CHRM3) on chromosome 1q43 was reported in one family. Treatment
The type of treatment, like that of most disorders, depends on the severity of the symptoms. One option is to perform a vesicostomy, which allows the bladder to drain through a small hole in the abdomen, thus helping to prevent urinary tract infections. Similarly, consistent self-catheterization, often several times per day, can be an effective approach to preventing infections. A more drastic procedure is a surgical "remodeling" of the abdominal wall and urinary tract.